K=+1
Mn= +7
O= -2
That’s it!!!
The oxidation number of each element in the compound are:
1. The oxidation number of K is +1
2. The oxidation number of O is –2
3. The oxidation number of Mn is +7
The oxidation number of certain elements are constant while others varies.
The oxidation number of potassium, K is always +1The oxidation number of oxygen, O is always –2 except in peroxides where it is –1Manganese, Mn has variable oxidation number. Thus, we shall determine the oxidation number of Mn in the compoundThe oxidation number of Mn in KMnO₄ can be obtained as follow:
KMnO₄ = 0 (ground state)
K = +1
O = –2
Mn = ?KMnO₄ = 0
K + Mn + 4O = 0
1 + Mn + 4(–2) = 0
1 + Mn – 8 = 0
Collect like terms
Mn = 0 + 8 – 1
Mn = +7Therefore, the oxidation number of Mn in KMnO₄ is +7
SUMMARY
1. The oxidation number of K is +1
2. The oxidation number of O is –2
3. The oxidation number of Mn is +7
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Use your understanding of the ideal gas law to
identify the correct relationships among the
variables
Pressure is
Temperature is
Volume is
Moles are
The Ideal Gas Law states that pressure and temperature are directly related, while pressure and volume are inversely related. Likewise, volume and temperature are directly related, while moles are proportional to temperature, pressure, and volume.
Explanation:The Ideal Gas Law is represented by the equation PV = nRT, where 'P' is pressure, 'V' is volume, 'n' is the number of moles, 'R' is the gas constant, and 'T' is temperature (in Kelvin).
This equation demonstrates that:
Pressure is directly proportional to the temperature and quantity of gas (moles), but inversely proportional to the volume. That means if temperature or moles increase, so does the pressure, but if volume increases, pressure decreases. Temperature is directly proportional to the pressure and volume, but inversely proportional to the moles. This means if pressure or volume increase, temperature will also increase. However, if the number of moles increases, the temperature decreases. Volume is directly proportional to the temperature and moles, but inversely proportional to the pressure. This means that volume will increase if temperature or moles increase and decrease if pressure increases. Moles are proportional directly to the temperature, pressure, and volume, meaning that an increase in any of these variables will result in an increase in the amount of gas. Learn more about Ideal Gas Law here:https://brainly.com/question/30458409
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The Ideal Gas Law, described by the equation PV=nRT, shows how pressure, volume, temperature and number of moles of a gas are related. They are all proportional to each other, with pressure and volume inversely proportional, and temperature and number of moles directly proportional.
Explanation:The Ideal Gas Law is represented by the equation PV = nRT, where P is pressure, V is volume, n is the number of moles of gas, R is the universal gas constant, and T is the absolute temperature. This equation describes how, under many conditions, the pressure, volume and temperature of a gas relate to each other.
Pressure is directly proportional to temperature and the number of moles, and inversely proportional to volume. Therefore, if the temperature or number of moles increases, the pressure increases, and if the volume increases, the pressure decreases.
Volume is directly proportional to temperature and the number of moles, and inversely proportional to pressure. Hence, an increase in temperature or number of moles will increase the volume, whereas an increase in pressure will decrease the volume.
Temperature is directly proportional to pressure, volume, and the number of moles. Thus, an increase in any of these variables leads to an increase in temperature.
Lastyly, the variable n represents the number of moles of gas present and it is directly proportional to pressure, volume, and temperature. As the number of moles increases, so does the pressure, volume, and temperature.
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Neils Bohr believed that electrons orbited the nucleus in different energy levels, based on strong support from
Answer:
the 3rd option for make sense,so that's out
Dalton was the pioneer behind the atomic model,but he certainly didn't believe in the nucleus or electrons,much lest electron shells.
Chadwick's discovery was the discovery of the neutron,not electron energy levels.
Niels Bohr's model was an attempt at explaining the hydrogen atom's spectrogram,followed by Erwin Schrödinger.Thus the first option is the answer
Niels Bohr's model of the atom, which posits electrons in fixed energy levels, was supported by observations of the hydrogen atomic spectrum. This spectrum showed distinct lines corresponding to electron transitions, which corroborated Bohr's theory that electrons occupy specific allowed orbits.
Niels Bohr, a Danish physicist, introduced a groundbreaking model of the atom in 1913. Central to Bohr's model was the concept that electrons move in definite orbital paths around the nucleus with specific allowable energy levels, which he referred to as stationary states. This idea was demonstrated using the hydrogen atomic spectrum as evidence, where the emitted light could be seen as distinct lines, each corresponding to an electron moving between these fixed energy levels.
In Bohr's theory, each energy level is quantized, meaning electrons can only occupy certain regions of space at certain energy levels. The electron can jump from one energy level to another, but it does not emit or absorb energy while staying in a given energy level. The hydrogen atomic spectrum provides a visual representation of these jumps as unique spectral lines created when electrons move back to lower energy levels, releasing energy in the form of light.
Bohr's conclusions were primarily derived from observations of the hydrogen atomic spectrum. Hence, option A, Hydrogen atomic spectrum, is the strong support for Bohr's belief that electrons occupied different energy levels. His model successfully predicted the energy levels for hydrogen, earning him the Nobel Prize in Physics in 1922. However, this model could not fully explain the spectra of atoms with more than one electron.
Given pH = 8.55 Find: [H3O+] and [OH-] Is this acidic, basic or neutral?
Answer:
[tex]\rm [H_3O^{+}] = 10^{-8.55}\;M\approx 2.82\times 10^{-9} \;M[/tex], and[tex]\rm [OH^{-}] = 10^{-5.45}\; M\approx 3.55\times 10^{-6}\;M[/tex]This solution is likely to be basic.
Assumption: this solution is under room temperature, where [tex]K_w = 10^{-14}[/tex].
Explanation:
The concentration of hydronium ions [tex]\mathrm{H_3O^{+}}[/tex] in the solution can be found from the [tex]\mathrm{pH}[/tex] value. This relationship does not depends on temperature.
[tex]\mathrm{[H_3O^{+}]} = 10^{-\mathrm{pH}} = 10^{-8.55}[/tex].
The question states that for this solution, [tex]\rm [H_3O^{+}] = 8.55\;M[/tex]. Apply the relationship between [tex]\mathrm{[H_3O^{+}]}[/tex], [tex]\mathrm{[OH^{-}]}[/tex], and [tex]K_w[/tex]. Note that the value of [tex]K_w[/tex] is dependent on the temperature of the solution.
[tex]\displaystyle \rm [OH^{-}] = \frac{\mathnormal{K_w}}{[H_3O^{+}]} = \frac{10^{-14}}{10^{-8.55}} = 10^{-5.45}\; M[/tex].
In other words,
[tex]\rm [H_3O^{+}] = 10^{-8.55}\;M\approx 2.82\times 10^{-9} \;M[/tex], and[tex]\rm [OH^{-}] = 10^{-5.45}\; M\approx 3.55\times 10^{-6}\;M[/tex] assuming that [tex]K_w = 10^{-14}[/tex].[tex]\rm [H_3O^{+}] < [OH^{-}][/tex].
In other words, this solution is basic.
when the mercury level in a barometer decreases that atmospheric pressure has
Answer:
increases
Explanation:
The barometer is a device that uses mercury in order to work and be able to measure the air pressure. The mercury reacts to the air pressure, so it either goes up or down. If the mercury goes down, that means that it is pressed more, thus the air pressure has increased, or rather is higher. If the mercury is lifting up, that means that there is less pressure from the air, thus the air pressure has declined, or rather is lower. It is a simple device that manages to do a very important job, and it is one of the most important devices used by the meteorologists for telling the current weather conditions, as well as predicting them for the next few days.
Which of the following are sources of revenue for media companies? A. Direct sales to producers B.advertising and subscriptions C. Online purchase D. Capital investments
Answer:
c
Explanation:
The revenue source is B. advertising and subscriptions.
Explanation:One of the most significant parts of media is the way that the media business is only that: an industry. Most media makers and outlets are business in nature, with the primary goal of profiting. There are a few strategies or “income models” that media organizations use to profit.
The four most regular income models are:
Advertising Subscription Pay-per term MerchandisingThus, from the options given in the question, option B which states that Advertisement and subscription is considered as best option for the given question.
. During a phase change, mass (3 points) stays the same increases decreases increases, then decreases
Answer:
increases
Explanation:
During a phase change, mass increases.
. Write the following isotope in nuclide notation (e.g., “ ”): copper-70
Answer:
[tex]^{70}_{29}Cu[/tex]Explanation:
The nuclide isotope notation represents the isotope by its chemical symbol preceded by a superscript (to the left of the chemical symbol) showing the mass number and a subscript (also the the left of the chemical symbol) showing the atomic number (number of protons).
Copper-70:
Chemical symbol: CuMass number: 70 Atomic number: 29 (the atomic number is found in any periodic table)Nuclide notation:
[tex]^{70}_{29}Cu[/tex]Science Help Needed NOW!!! Running Out of TIME!!!!
Will give BRAINLIEST
1.) The atomic emission spectrum of hydrogen includes four visible colors of light: red, blue-green, indigo, and violet. Which color of light corresponds with the largest electron transition?
A.) blue-green
B.) red
c.)indigo
d.) violet
2.) Hydrogen’s emission spectrum includes a line of violet light that has a frequency of
7.31∗1014 Hz. What is the energy (in joules) a photon of the violet light?
These are two questions and two answers
Question 1.) The atomic emission spectrum of hydrogen includes four visible colors of light: red, blue-green, indigo, and violet. Which color of light corresponds with the largest electron transition?
A.) blue-green
B.) red
c.) indigo
d.) violet
Answer:
violetExplanation:
The atomic emission spectrum is the set of coloer lines or frequencies of electromagnetic waves emitted by the atoms of an element due to the transition of the electrons from an upper energy level to a lower energy level.
The higher the jump of the electron during the transition, the higher the energy of th emssion and the higher the frequency of the electromagnetic wave emitted.
The color of light is related with the frequency of the electromagnetic wave.
The order of the frequencies for the visible light are:
red < orange < yellow < green < blue < indigo < violet.Then, violet is the visible light with the highest energy, whicn means that it corresponds to the largest electron transition.
Quesiton 2.) Hydrogen’s emission spectrum includes a line of violet light that has a frequency of 7.31∗10¹⁴ Hz. What is the energy (in joules) a photon of the violet light?
Answer:
4.84 × 10⁻¹⁹ JExplanation:
The energy of a photon of light is related with its frequency by the Planck - Einstein equation:
E = h×fWhere,
E is the energy of the photon,h is Planck's constant: 6.626 × 10⁻³⁴ J.sf is the frequency of the photon.Then, you can just substitute the frequency and the constant to obtain the energy:
E = 6.626 × 10⁻³⁴ J.s × 7.31 10¹⁴ Hz = 4.84 × 10⁻¹⁹ J ← answer(1) The color of light that corresponds with the largest electron transition is violet.
(2) The energy of the violet light with the given frequency is 4.84 x 10⁻¹⁹ J.
The increasing order of the frequencies of the visible light in electromagnetic spectrum include the following:
Red Orange ↓ Yellow Green Blue Indigo Violet.Thus, the color of light that corresponds with the largest electron transition is violet.
(2)
The energy of the violet light with the given frequency is calculated as follows;
E = hf
where;
h is Planck's constant = 6.626 x 10⁻³⁴ JsE = (6.626 x 10⁻³⁴) x (7.31 x 10¹⁴)
E = 4.84 x 10⁻¹⁹ J.
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What is a good explanation as to why water boils in a pot sitting over fire...
Answer:
Thermal energy from the fire is transferred to the water in the pot in the form of heat
Explanation:
A good explanation as to why water boils in a pot sitting over fire is; Thermal energy from the fire is transferred to the water in the pot in the form of heat
What are the spectator ions in Mg(s) + Zn2+ + 2NO3 → Mg2+ + 2NO3 + Zn(s)?
Answer:
NO₃⁻.
Explanation:
Spectator ions are the ions that is present in the same form on both sides of a chemical equation (do not change).For the reaction: Mg(s) + Zn²⁺ + 2NO₃⁻ → Mg²⁺ + 2NO₃⁻ + Zn(s),
The reactants' side contains two ions : Zn²⁺ and NO₃⁻.Also, the product's side also contains two ions : Mg²⁺ and NO₃⁻.
Because the nitrate anions are present on both sides of the equation, they are spectator ions.
In the reaction, the spectator ions are the nitrate ions (NO3-), as they do not participate in the reaction and remain unchanged.
In the provided reaction Mg(s) + Zn2+ + 2NO3- → Mg2+ + 2NO3- + Zn(s), the spectator ions are the nitrate ions (NO3-). These ions are present on both sides of the equation and do not participate in the exchange of electrons, which occur between the Mg(s) and Zn2+ ions. Consequently, they can be omitted when writing the net ionic equation, which focuses solely on the species that undergo chemical change.
Can someone please help me with the empirical formula of
C:63.15% H:5.30%
O:31.55%
I am getting 3C 3H 1O but that’s not one of the options on my sheet so I don’t know if I’m doing it wrong because all my other ones are done right
Answer:
C12H12NO3
Explanation:
Answer:
The answer is C8H8O3.
You rounded in a place where you shouldn't have (see explanation below)!
Explanation:
These are percents by mass. Pretend you have a 100g sample. That means you have:
63.15g C
5.30g H
31.55g O
Divide each by molar mass to find the moles of each:
C: 63.15 / 12 = 5.26 mol
H: 5.30 / 1 = 5.30 mol
O: 31.55 / 16 = 1.97 mol
Now divide each of these values by the lowest of the three to find the ratio between each element in the compound:
C: 5.26 / 1.97 ≈ 2.67
H: 5.30 / 1.97 ≈ 2.69
O: 1.97 / 1.97 = 1
These aren't whole numbers and you can't just round up. If the numbers you ended with were something around 2.98, I would be fine with rounding to 3. But here 2.67 is too different from 3 to the point where we're actually considering a completely different compound.
So, we need to multiply them all by some factor to get whole numbers that will make sense in a chemical formula. If you express 2.67 and 2.69 as fractions, you get about 8/3, and 1 can be represented as 3/3, so 3 is the LCD of all three numbers. Multiply each of the numbers by 3 to get your final answer:
C: 2.67 x 3 ≈ 8
H: 2.69 x 3 ≈ 8
O: 1 x 3 = 3
Side note: if you take the percent masses of the empirical formula you came up with, you'll see they're quite different from the one the question provided, which is why you can't round in this situation:
Finding mass using your empirical formula:
C: 3 x 12 = 36
H: 3 x 1 = 3
O: 1 x 16 = 16
Total mass = 36 + 3 + 16 = 55
% mass:
C: 36/55 = 65.45% (vs. 63.15%)
H: 3/55 = 5.45% (vs. 5.30%)
O: 16/55 = 29.09% (vs. 31.55%)
The values differ by more than 2% in some cases!
How many miles of water are produced if 5.43 mol PBO2 are consumed
Answer:
Amount of oxygen = 2 * 5.43 moles
= 10.86 moles
Explanation:
Answer:Correct answer 10.9
Explanation:
what substance has a mass of 9.5g and volume of 2.1cm^3
Answer: i belive its 55
Explanation:tyy
How does chemistry affect our world?
A. Chemicals makes our world more polluted.
B. Chemicals keeps us healthy.
C. Chemicals can help or hurt our world.
D. Chemicals make our world safe to live in.
Answer:
C.Chemicals can help or hurt our world.
Explanation:
Chemistry: it is a branch of science which study the composition, properties and activity of organic substances and inorganic substances and various elementary forms of matter.
It study chemical reactions,properties and phenomenon etc.
In chemistry, we use chemicals for chemical reactions.
Drugs are made with salt like aspirin .Salt are chemicals.
Chemical use in drugs and drugs are used for treatment of diseases.
Then, chemicals are useful in these case.
But, the chemicals used in fertilizers, use for production increase of fruits and vegetables.Then it is harmful for humans and soils.
In this way it harmful for our world.
Hence, chemicals can help or hurt our world is correct answer.
Answer:C.Chemicals can help or hurt our world.
The correct option is C, Chemicals can help or hurt our world.
How does chemistry affect our world?Chemistry plays a significant role in shaping our world and has both positive and negative impacts. Here are a few ways in which chemistry affects our world:
Medicines and Healthcare: Chemistry is crucial for the development and production of medicines, allowing us to treat diseases, alleviate symptoms, and improve overall health. It enables the discovery of new drugs, the understanding of biochemical processes, and the synthesis of pharmaceutical compounds.
Agriculture: Chemistry is involved in various aspects of agriculture, such as the development of fertilizers, pesticides, and herbicides. These chemicals help increase crop yields and protect plants from pests and diseases. Additionally, chemistry is essential in studying soil composition, plant nutrition, and developing new agricultural technologies.
Energy Production: Chemistry plays a vital role in energy production, including fossil fuels, nuclear power, and renewable energy sources. It is involved in the extraction, processing, and transformation of energy resources. Chemistry also contributes to the development of more efficient and sustainable energy technologies, such as batteries and solar cells.
Materials and Manufacturing: Chemistry enables the synthesis and manipulation of materials, leading to the development of new products and technologies. It is involved in the production of plastics, metals, ceramics, and composite materials, which are used in various industries like construction, electronics, automotive, and aerospace.
Environmental Impact: While chemicals have improved various aspects of our lives, they can also have negative effects on the environment. Certain chemicals, when released into the environment without proper management, can cause pollution and harm ecosystems. For example, industrial pollutants, emissions from vehicles, and improper waste disposal can lead to air, water, and soil pollution.
It is important to note that the impact of chemicals on the world depends on how they are used, managed, and regulated. Responsible and sustainable chemical practices can minimize negative effects and maximize the benefits of chemistry in our society.
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a chemist determined by measurements that 0.0300 most of Beryllium oxide participate in a chemical reaction calculate the mass of Berlylium oxide that participates
Answer:
0.75g
Explanation:
From the given problem, the known parameters are:
Number of mole of BeO = 0.03mole
The unknown is the mass of BeO = ?
The formula of the compound is BeO
To solve this kind of problem, we use the mole relationship between number of mole and mass. This is expressed below mathematically:
Mass of BeO = number of moles of BeO x Molar mass of BeO
The molar mass of BeO:
Atomic mass of Be = 9g
Atomic mass of O = 16g
Molar mass of BeO = 9 + 16 = 25g/mol
Mass of BeO = 0.03 x 25 = 0.75g
The mass of BeO that participates is 0.75g
The mass of Beryllium oxide that participates in the chemical reaction is 0.7506 grams.
Explanation:To calculate the mass of Beryllium oxide that participates in the chemical reaction, we need to convert the given amount of moles to grams. The molar mass of Beryllium oxide (BeO) is 25.02 g/mol. Since we know that 0.0300 moles of BeO participate in the reaction, we can use the formula:
Mass = moles × molar mass
Mass = 0.0300 mol × 25.02 g/mol = 0.7506 g
Therefore, the mass of Beryllium oxide that participates in the chemical reaction is 0.7506 grams.
Which equation represents the total ionic equation for the reaction of HNO3 and NaOH?
• H + OH -> H2O
HNO3 + NaOH — NaNO3 + H20
H* + NO3 + Na+ + OH — Na + NO3 + H20
H* + NO3 + OH -—_NO3 + H20
The total number of dissociated ions in a chemical reaction is shown by the entire ionic equation. Ions that are visible on both sides of the reaction arrow are canceled out by the net ionic equation. The correct option is A.
A chemical equation known as an ionic equation expresses the electrolytes in aqueous solution as dissociated ions. The ionic species are usually followed by (aq) in the equation to denote that they are in an aqueous solution, and this is typically a salt that has been dissolved in water.
The molecular equation is:
HNO₃ + NaOH → NaNO₃ + H₂O.
And the ionic equation: H⁺ + OH⁻ → H₂O.
Na⁺ and NO₃⁻ ions are in an aqueous solution on both sides of the equation, so they are spectator ions. They are not part of the net ionic equation.
So, the net ionic equation is:
H⁺ + OH⁻ → H₂O.
Thus the correct option is A.
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The correct total ionic equation is: H⁺ + NO₃⁻ + Na⁺ + OH⁻ → Na⁺ + NO₃⁻ + H₂O which corresponds to option C.
When considering the reaction between HNO₃ and NaOH, we start by identifying the complete ionic equation. Since both HNO₃ and NaOH are strong electrolytes, they will dissociate completely in aqueous solution:
HNO₃(aq) dissociates into H⁺(aq) and NO₃⁻(aq)NaOH(aq) dissociates into Na⁺(aq) and OH⁻(aq)The total ionic equation for the reaction then becomes:
H⁺(aq) + NO₃⁻(aq) + Na⁺(aq) + OH⁻(aq) → Na⁺(aq) + NO₃⁻(aq) + H₂O(l)Here, Na⁺ and NO₃⁻ are spectator ions as they do not participate in the reaction. Thus, the net ionic equation, which shows only the species that undergo chemical change, is:
H⁺(aq) + OH⁻(aq) → H₂O(l)Therefore, the correct complete ionic equation for the reaction is:
H⁺ + NO₃⁻ + Na⁺ + OH⁻ → Na⁺ + NO₃⁻ + H₂OComplete Question: -
Which equation represents the total ionic equation for the reaction of HNO₃ and NaOH?
A. H⁺ + OH⁻ → H₂O
B. HNO₃ + NaOH → NaNO₃ + H₂O
C. H⁺ + NO₃⁻ + Na⁺ + OH → Na⁺ + NO₃⁻ + H₂O
D. H⁺ + NO₃⁻ + OH⁻ → NO₃⁻ + H₂O
Cells produced at the end of telophase I have ____ as many _____ chromosomes as cells that started the process.
Answer:
The first blank is half
The second blank is replicated
Explanation:
Cells produced at the end of telophase I have half as many replicated chromosomes as cells that started the process.
What role does the inner ear play in hearing?
captures sound waves
converts sound waves into electrical signals
removes high and low sound waves that are harmful
transmits sound waves from air to fluids
Answer:
The ossicles amplify the sound. They send the sound waves to the inner ear and into the fluid-filled hearing organ (cochlea). Once the sound waves reach the inner ear, they are converted into electrical impulses. The auditory nerve sends these impulses to the brain.
Sound waves enter the outer ear and travel through a narrow passageway called the ear canal, which leads to the eardrum. The bones in the middle ear amplify, or increase, the sound vibrations and send them to the inner ear—also called the cochlea—which is shaped like a snail and is filled with fluid.
Answer:
its (A) trust me I had that same qeu
Explanation:
What causes different colors to appear in the sky?
the absorption of light by air molecules
the reflection of light by bodies of water
the greenhouse effect in Earth's atmosphere
the scattering and reflection of light by dust particles
Answer:
the scattering and reflection of light by dust particles
Answer:
the scattering and reflection of light by dust particles
Explanation:
The process of scattering is responsible for the different colors we see in the sky.
Different colors have have some different wavelengths, and hence, scatter accordingly.
The small dust particles that is present in the air , gets scattered as the light falls on the dust particles , and hence give various colors to the sky , since , blue is the color that is scattered the most , therefore , maximum sky is blue in color .
Similarly during night time , there is no light , hence , the sky appears dark.
NO
Assign oxidation numbers to each element in this compound.
Answer:
N=+2
O=-2
Explanation:
The compound NO is electrically neutral.
Lets assign the oxidation number of nitrogen to be N. The oxidation number of oxygen (-2) is then used as a reference.
For the compound to have a zero charge, sum of the oxidation numbers equals zero.
N+ (-2)=0
N=+2
O=-2
Can someone plz help me with Visualize it! 5 plz I will mark them Brainliest
independent variable is temperature and dependent is the number of cold drinks sold. It's because the temperature is being changed without any outer influence while the number of cold drinks sold changes based on the weather. It's like cold drinks are going to sell better in the summer because it's hot vs in the winter because it's cold. The change in temperature isn't relying on anything but the drink is.
20 POINTS!!! PLEASE HELP!!!! ASAP!!!!!1
A metal has higher reactivity than magnesium. Which of the following statements about the location of this metal on the periodic table can be true?
A. The metal is to the right of magnesium in the same row.
B. The metal is to the left of magnesium in the same row.
C. The metal is below magnesium in the same column.
D. The metal is above magnesium in the same column.
Answer:
The answer is B (sodium is more reactive)
Explanation:
The lesser reactive element to magnesium is present on the left side of the magnesium in the periodic table in the same row. Thus, option B is correct.
What is a periodic table?The periodic table is given as the arrangement of the elements in columns and rows based on the increasing order of the atomic number and the number of valence electrons.
In a periodic table, on moving from left to right reactivity increases, and from top to bottom reactivity decreases.
Thus, the element with the lesser reactivity than magnesium is present in the left of the magnesium in the same row. Thus, option B is correct.
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What is a solute?
o the liquid in a solution
o the solid in a solution
the substance that dissolves
Answer:
The substance that dissolves
Explanation:
Solute is the substance that disappears into a liquid. For example,when salt dissolves in water,the salt is the solute because it is the substance that saluted.
Answer:
What is a solute?
The answer is C. The substance that gets dissolved.
What is a solvent?
The answer is C. The substance
that dissolves the solute.
Explanation:
Will vote brainliest!! Can someone please help me with the empirical formula of
C:46.66% H:4.48%
N:31.10% O:17.76%
I am getting 3C 4H 2N 1O but this is not one of the options so I don’t know if I’m doing it wrong or the question is wonky because I did all the others right
Answer:
It’s simple. You’re doing it right, the question is just messed up. If you think about it it’s like H2O
Explanation:
Answer:
The answer is C7H8N4O2.
Same problem as your other question - you rounded in a place where you shouldn't have (see explanation below, exact same process)!
Explanation:
These are percents by mass. Pretend you have a 100g sample. That means you have:
46.66g C
4.48g H
31.10g N
17.76g O
Divide each by molar mass to find the moles of each:
C: 46.66 / 12 = 3.89 mol
H: 4.48 / 1 = 4.48 mol
N: 31.10 / 14 = 2.22 mol
O: 17.76 / 16 = 1.11 mol
Now divide each of these values by the lowest of the three to find the ratio between each element in the compound:
C: 3.89 / 1.11 ≈ 3.5
H: 4.48 / 1.11 ≈ 4
N: 2.22 / 1.11 = 2
O: 1.11 / 1.11 = 1
As with your other question, 3.5 is too different from 3, so you can't round it down. The .5 makes it easy to find the LCD - it's 2. Multiply each of the numbers by 2 to get your final answer:
C: 3.5 x 2 = 7
H: 4 x 2 = 8
N: 2 x 2 = 4
O: 1 x 2 = 2
Again, if you were to take the percent masses of the empirical formula you came up with, you'll see they're quite different from the one the question provided, which is why you can't round in this situation.
Can someone help me with 18 to 22plz.
Answer:
18 True
19 True
20 False
21 True
Explanation:
Which statement is true according to the kinetic theory?
A.
Molecules of different gases with the same mass and temperature always have the same average density.
B.
Molecules of different gases with the same mass and temperature always have the same average volume.
C.
Molecules of different gases with the same mass and temperature always have the same pressure.
D.
Molecules of different gases with the same mass and temperature always have the same molecular mass.
E.
Molecules of different gases with the same mass and temperature always have the same average kinetic energy.
Answer:
I want to say B but I'm not sure
Answer:
The statement E is true on average kinetic energy; and mass and temperature. If gases from different types have same quantity of mass and same quantity of temperature then there will be same quantity in average kinetic energy.
Explanation:
The gaseous kinetic theory has the assumption that the size of molecules in any compound is very small compared to the distance between them. Also, the molecules are always in a vibration and it collides with boundary of cylinder and with each other.
In reference to the kinetic theory of gases, the different gases having different mass at same temperature always have the same quantity of average kinetic energy because the average kinetic energy of gases has directly proportional relation to the gaseous temperature.
The gas at higher temperature has higher kinetic energy amount and vice-versa.
2. Which is a product in the following chemical reaction? CH4 + 202 - CO2 + 2H20
Answer:
Co2 and 2H2O are products
Explanation:
In this chemical equation, CH4 and 2O2 react with each other to create a double replacement reaction which creates CO2 and 2H20
Hope this helps!
If an area has high air pressure and low humidity, what type of weather will it most likely have?
Plz help!!!
Areas with high air pressure and low humidity typically have fair and dry weather due to sinking air that discourages cloud formation and a lack of moisture that reduces precipitation likelihood.
Explanation:If an area has high air pressure and low humidity, it is likely to experience fair and dry weather. High air pressure usually involves sinking air, which inhibits cloud formation and leads to clearer skies. Low humidity means there is less moisture in the air, further reducing the likelihood of precipitation. Without the rising, condensing air masses characteristic of low-pressure systems, which produce clouds and precipitation, an area with high pressure and low humidity tends to have stable and pleasant weather.
Three alkali metals in group 1 are
A. calcium, strontium, barium
B. boron, aluminum, gallium
C. sodium, potassium,
rubidium
D. fluorine, iodine, chlorine
Answer:
C
Explanation:
same electron configuration
The carbon bond strengths of graphite and diamonds are identical. True or False
Answer:
false :)
Explanation:
Hello There!
The carbon bond strengths of graphite and diamonds are not identical.
"FALSE STATEMENT"