None Of the Above
Is the answer
Hope this helped plz mark
Hi There!
Question - What is a stationary front?
Answer - None of the above.
Why - The reason I say this because in a stationary front its made of low pressure systems so its not A or B. The wind blows the low pressure system which cause precipitation. If its not D then is C.
Hope This Helps :)
what is the nucleus of atom made of
The answer is:
The nucleus of atom is made of protons and neutrons.
Hope it helps!
the answer is protons and neutrons. :)
A bob of mass of 0.18 kilograms is released from a height of 45 meters above the ground level. What is the balue of the kinetic energy gained by the bob at the ground level?
Final answer:
The kinetic energy of a bob released from a height can be calculated using its initial gravitational potential energy, which converts to kinetic energy as it falls. Assuming no energy is lost, the kinetic energy at ground level equals the initial potential energy calculated with the mass, acceleration due to gravity, and the height from which it was released.
Explanation:
The question involves calculating the kinetic energy gained by a bob as it falls to the ground from a certain height. To determine the kinetic energy of the bob at ground level, we can start by calculating its potential energy at the initial height using the formula gravitational potential energy (GPE) = m × g × h, where m is the mass of the bob, g is the acceleration due to gravity, and h is the height above ground. Assuming that no energy is lost to air resistance or other forms of dissipation, the potential energy will convert entirely to kinetic energy as the bob falls.
For a bob with a mass of 0.18 kilograms released from a height of 45 meters, the initial gravitational potential energy (GPE) would be 0.18 kg × 9.8 m/s² × 45 m. At the ground level, all this potential energy would have been converted to kinetic energy, because the height is now zero and hence the potential energy is zero.
The formula for kinetic energy is KE = ½ × m × v², where v is the velocity at the ground level. But since we do not need to calculate velocity here, we can simply state that the kinetic energy at ground level equals the initial potential energy due to the principle of conservation of energy. So the kinetic energy of the bob at ground level would be the same as the initial potential energy, which can be calculated using the GPE formula provided above.
Suppose you were balancing a chemical equation that contained the substance sodium nitrate, NaNO3, composed of a sodium ion, Na+1, and a nitrate ion, (NO3)-1. Could you change any of these numbers in order to balance the equation?
Explanation:
When a reaction equation contains equal number of atoms on both reactant and product side then this type of chemical equation is known as balanced chemical equation.
For example, multiply this equation by 2 as follows.
[tex]2Na^{+} + 2NO^{-1}_{3} \rightarrow 2NaNO_{3}[/tex]
When sodium ions chemically combine with nitrate ions then it results into the formation of sodium nitrate.
Number of atoms on reactant side are as follows.
[tex]Na^{+}[/tex] = 2
[tex]NO^{-1}_{3}[/tex] = 2
Number of atoms on product side.
Na = 2
[tex]NO_{3}[/tex] = 2
Therefore, as it contains same number of atoms on both reactant and product side.
Also, we can never change the subscripts present in a reaction equation but we can change the number of coefficients on each side in order to balance a chemical equation.
Identify, and briefly explain, two key elements needed for fossilization. must be 3 sentences.
For a fossil to form, several conditions have to be met. First of all, the animal had to live in the given area! Animals live in many environments on Earth, but not everywhere. The water above many lake bottoms and many areas of the deep ocean bottom are stagnant. The bottom water is never exchanged with surface waters, so the water contains no dissolved oxygen. Animals cannot live without oxygen, so no animals live there. In these situations, the only possibility of fossilization is if a fish or other swimming animal dies in oxygen-rich waters above, sinks down into the stagnant muddy bottom, and is buried by sediments.
Answer:
In order for fossilization to occur, the following conditions are required: Hardbody parts (bones, teeth, shells) – soft body parts will not fossilize but may leave behind trace evidence.
Preservation of remains (protection against scavenging, erosion, and environmental damage)
Assign oxidation numbers to each element in this compound. NO
Answer:
NO ---> N +2 and O -2
Explanation:
Oxidation numbers are assigned to the elements of a compound to keep a track of the number of electrons each atom has.
Here we have a compound NO (Nitrogen Oxide). The Nitrogen is assigned an oxidation number of +2 while Oxygen in this compound is assigned an oxidation number of -2.
So the algebraic sum of the oxidation numbers of the elements in the compound NO is equal to zero.
Answer:
+2, -2
Explanation:
As per the rule of assigning oxidation number, the oxidation number of O atom is -2. The sum of the oxidation number of a neutral compound is zero. Let us assume x to be the oxidation number of N.
x + (-2) = 0
x – 2 = 0
x = +2
Therefore the oxidation of N in NO is +2 and and the oxidation of O in NO is -2 respectively.
Clary ran 20 miles in four hours. What was her average speed?
5 miles per hour
20/4=5
explain the difference between two types of elements with respect to the atoms
A particular atom will have the same number of protons and electrons and most atoms have at least as many neutrons as protons. An element is a substance that is made entirely from one type of atom. ... A compound is a substance made from two or more different elements that have been chemically joined.
Given a mixture of sand and water, state one process that can be used to separate water from the sand
use filtration because sand isn't soluble in water.
Filtration is the process used to separate water from sand in a heterogeneous mixture, utilizing filter paper to allow water to pass through while retaining the sand particles.
One process that can be used to separate water from sand is filtration. This technique is used to separate a heterogeneous mixture of a solid and a liquid. When you have a mixture of sand in water, you can pass this mixture through a filter paper. The water will flow through the filter paper, while the sand particles are caught by the filter, thus separating the two components.
Filtration keeps the physical properties of the substances intact as it is a mechanical means of separation, requiring no chemical process. The sand remains as sand, and the water remains as water after the filtration process. This is a simple yet effective method to use if you need to separate solid materials from liquids, such as in the case of a sand and water mixture.
How can the concentration of a solution be changed
The mass of the salt converted into moles divided by the liters of water in a solution would give the Molarity (M) or concentration of the solution. The simplest way to change the solution would be to change the amount of solute or solvent in a solution.
A compound has a molar mass of 92.02 grams/mole, and its percent composition is 30.4% nitrogen (N) and 69.6% oxygen (O). What is its molecular formula? A. N2O4 B. NO2 C. N2O D. N4O2
The answer is: A. N2O4.
M(NₓOₙ) = 92.02 g/mol; molar mass of unknown compound.
If we take 100 grams of sample:
m(N) = 0.304 · 100 g.
m(N) = 30.4 g; mass of nitrogen.
n(N) = 30.4 g ÷ 14.01 g/mol.
n(N) = 2.17 mol; amount of nitrogen.
m(O) = 0.696 · 100 g.
m(O) = 69.6 g; mass of oxygen
n(O) = 69.6 g ÷ 16 g/mol.
n(O) = 4.35 mol; amount of oxygen.
n(N) : n(O) = 2.17 mol : 4.35 mol.
n(N) : n(O) = 1 : 2.
Answer is N₂O₄ or NO₂, so we must find molar mass.
M(N₂O₄) = 2Ar(N) + 4Ar(O) · g/mol.
M(N₂O₄) = 92.02 g/mol.
Final answer:
The molecular formula for the compound with a molar mass of 92.02 grams/mole and a percent composition of 30.4% N and 69.6% O is N2O4. The empirical formula is NO2, and since the molar mass of N2O4 matches the given molar mass, N2O4 is the correct molecular formula.
Explanation:
The molecular formula of a compound with a molar mass of 92.02 grams/mole and a percent composition of 30.4% nitrogen (N) and 69.6% oxygen (O) can be determined by first finding the molar amount of each element in one mole of the compound. Using the percent composition and the atomic masses of N (14.01 amu) and O (16.00 amu), we can calculate the moles of each element in one mole of the compound:
For nitrogen: (30.4 g N / 92.02 g compound) × (1 mol N / 14.01 g N) = 0.217 moles of NFor oxygen: (69.6 g O / 92.02 g compound) × (1 mol O / 16.00 g O) = 0.435 moles of OSince the molar amounts of N and O are in a ratio that simplifies nearly to 1:2, the empirical formula of the compound is likely NO₂. To confirm the molecular formula based on the given molar mass, we need to compare the empirical formula mass with the molar mass:
NO₂ has an empirical formula mass of (1 × 14.01 amu) + (2 × 16.00 amu) = 46.01 amu. The molar mass is approximately twice the empirical formula mass, which suggests that the molecular formula is (NO₂)₂ which is N₂O₄, option A. Therefore, the correct molecular formula is N₂O₄.
pls help me with this
The answer is detached earlobes so it's
D) AA
the change in momentum experienced by a object is equivalent to the...
a. objects kinetic energy.
b.force acting on the object.
c. impulse acting on the object.
d. objects potential energy.
e. objects velocity.
Answer is: c. impulse acting on the object.
Momentum is the product of the mass and velocity of an object. It is a vector quantity, possessing a magnitude and a direction in three-dimensional space.
The impulse-momentum change equation: F· t = m · Δ v.
The impulse experienced by the object equals the change in momentum of the object.
how is the modern atomic model similar to bohr's model?
Bohr thought that electrons orbited the nucleus in circular paths; whereas in the modern view atomic electron structure is more like 3D standing waves. Bohr built upon Rutherford's model of the atom. ... He believed that electrons moved around the nucleus in circular orbits with quantised potential and kinetic energies.
Modern atomic model is similar to Bohr's atomic model by the fact that an atom has a nucleus around which electrons revolve in circular orbits.
What is Bohr's atomic model?Atomic model presented by Bohr is a system comprising of small dense nucleus surrounded by electrons which is similar to the solar system. The only difference being electrostatic forces in place of gravity.
It is successful in explaining the Rydberg's formula for emission of spectral lines of hydrogen. According to this model, electron is able to revolve in stable orbits around the nucleus without any energy being radiated.
Stationary orbits are obtained at distances for which revolving electrons have an angular momentum which is an integer multiple of Planck's constant. Electrons can only gain or loose energy by jumping from one orbit to another.
Learn more about Bohr's atomic model ,here:
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whould a noble gas like argon gain or lose electrons?
Argon has an atomic number of 18 which means that it has 18 electrons. This means that it has a full outer shell. Therefore, it would not have to bond or share with other elements to gain or lose any more electrons since it is already stable.
How many molecules of carbon monoxide are in 10 mL at STP
The number of carbon monoxide that are in 10 ml at STP is 2.68 x 10²⁰ molecules
calculation
Step 1 : convert 10 ml to L
convert 10 ml to L = 10/1000 =0.01 L
Step 2: find the moles of CO at STP
That is at STP 1 mole = 22.4 L
?moles = 0.01 L
by cross multiplication
= {0.01 L x 1 mole)/22.4 L} =4.46 x 10⁻⁴ moles
Step 3 ; find the number of molecules of Co using the Avogadro's law constant
that according to Avogadro's law 1 moles = 6.02 x 10²³
4.46 x 10⁻⁴ moles =? molecules
by cross multiplication
= {(4.46 x 10⁻⁴ moles) x( 6.02 x 10²³ molecules) / 1 mole} =2.68 x 10²⁰ molecules
Potassium dihydrogen phosphate KH2PO4 and sodium nitrate NaNO2 solutions are mixed together in a beaker. Determine the net ionic equation for the most likely acid-base reaction.
Potassium dihydrogen phosphate (KH2PO4) and sodium nitrate (NaNO2)
Molecular equation:
KH₂PO₄ (aq) + 3NaNO₂(aq) → Na₃PO₄(s) + KNO₂(aq) + 2HNO₂ (aq)
The net ionic equation is:
3Na⁺(aq) + PO₄⁻(aq) → Na₃PO₄(s)
The rest of the ions are spectator ions and tend to cancel out on both sides of the reaction.
Final answer:
The net ionic equation for the acid-base reaction between KH2PO4 and NaNO2 is 2 Na+(aq) + 2 NO2-(aq) -> 2 NO2-(aq) + 2 Na+(aq).
Explanation:
The net ionic equation for the acid-base reaction between potassium dihydrogen phosphate (KH2PO4) and sodium nitrate (NaNO2) can be determined as follows:
1. Write the balanced molecular equation: 2 KH2PO4 (aq) + NaNO2 (aq) -> 2 KNO2 (aq) + H2PO4 (aq)
2. Write the complete ionic equation, showing the dissociation of the soluble compounds: 2 K+(aq) + 2 H2PO4-(aq) + Na+(aq) + NO2-(aq) -> 2 K+(aq) + 2 NO2-(aq) + H2PO4-(aq)
3. Cancel out the spectator ions (K+ and H2PO4-) to obtain the net ionic equation: 2 Na+(aq) + 2 NO2-(aq) -> 2 NO2-(aq) + 2 Na+(aq)
The net ionic equation for the most likely acid-base reaction between KH2PO4 and NaNO2 is 2 Na+(aq) + 2 NO2-(aq) -> 2 NO2-(aq) + 2 Na+(aq).
Why would it be challenging to use static electricity devices, such as your television or stereo
Consider the location of barium, chlorine, iodine, and strontium on the periodic table. Electronegativities Which type of atom has the strongest attraction for electrons in bond formation? barium (Ba) chlorine (Cl) iodine (I) strontium (Sr)
Answer: The correct answer is Chlorine (Cl).
Explanation: Electronegativity is the property of an element to attract the shared pair of electron towards itself. In a periodic table, the electronegativity increases as we move from left to right and it decreases as we move from top to bottom.
The location of the given elements are:
Barium (Ba): It belongs to Group 2 and Period 6 of the periodic table.
Chlorine (Cl): It belongs to Group 17 and Period 3 of the periodic table.
Iodine (I): It belongs to Group 17 and Period 5 of the periodic table.
Strontium (Sr): It belongs to Group 2 and Period 5 of the periodic table.
From the above information, Chlorine belongs to the lowest period and greatest group number. Hence, it has the highest electronegativity and will attract the shared pair of electron towards itself strongly.
Therefore, the correct answer is Chlorine (Cl).
The more right you are and the more up you are, the stronger the connection.
Start by going left to right. The two furthest are Iodine and Chlorine (so barium and strontium are eliminated). Then look at that column vertically. Chlorine is further up, so that is your answer.
The muscle that connects to the back of the pelvic girdle and femur
Gluteal muscle is the correct answer i believe.
The muscle that connects to the back of the pelvic girdle and the femur is the gluteus maximus which extends and abducts the femur. Other muscles contribute to the movement and stabilization of the hip and thigh. The pelvic girdle and femur have several muscles attached, aiding in various movements at the hip joint.
Explanation:The muscle that connects to the back of the pelvic girdle and the femur is the gluteus maximus. Located in the gluteal region, this large muscle is primarily responsible for extending and abducting the femur. It is a part of the appendicular muscles of the pelvic girdle and lower limbs, which play a key role in connecting the legs to the axial skeleton and enabling locomotion.
Other notable muscles in this region include the gluteus medius, iliacus, and psoas major which, along with the gluteus maximus, contribute to the movement and stabilization of the hip and thigh. The pelvic girdle is firmly attached to the axial skeleton by strong ligaments and also has robust ligaments creating a deep socket for the femur.
The femur, the longest bone in the human body, also has various other muscles attached along its posterior side, such as the piriformis, obturator internus, and obturator externus. These muscles are essential for the rotation and abduction of the femur at the hip joint. While there are many muscles involved in these processes, the primary muscle that connects the back of the pelvic girdle and the femur is the gluteus maximus.
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Plants are able to produce special chemicals at the right time and place.
True
or
False
TRUE its glucose if they have sunlight
Hi There,
The answer is:
True
Hope this helps have a great day :)
What substance cannot be broken down by chemical change
Potassium is the simplest form of matter and therefore can not be broken down by chemical change.
A participant took 5.2 hours to complete a marathon. How many minutes did the participant take to complete the marathon? Use 1 hour = 60 minutes 11.5 minutes 33.8 minutes 312 minutes 322 minutes
Answer:
Option C. 312 minutes
Explanation:
A participant took 5.2 hours to complete a marathon.
5.2 hours = 5 hours 12 minutes
In this question we have to convert hours and minutes into minutes.
1 hour = 60 minutes
5.2 hours = 60 × 5.2 = 312 minutes
Participant took 312 minutes to complete the marathon.
The answer to (3.540)x(0.0065)x(401) should have ____.
A.four decimal places
B. Two significant figures
C. Four significant figures
D. Two decimal places
Final answer:
The result of the multiplication should have two significant figures since the number with the least number of significant figures involved in the calculation is 0.0065, which has two significant figures. option B
Explanation:
The question is asking how many decimal places or significant figures the result of the multiplication (3.540) × (0.0065) × (401) should have. According to the rules of significant figures, the answer should have the same number of significant figures as the measurement with the fewest significant figures.
In this case, that is the number with two significant figures, which is 0.0065. Therefore, the final answer should also have two significant figures.
Additionally, it's noted that the number 0.0065 would be expressed as 6.5 × [tex]10^{-3}[/tex] in scientific notation, which confirms it has two significant figures. It is important to calculate it completely to generate an accurate answer with proper significant figures.
What does adhesion mean
The action or process of adhering to a surface or object.
the action or process of adhering to a surface or object.
Chlorophyll is essential to photosynthesis because it traps the _______________ needed.
A. oxygen
B. water
C. carbon dioxide
D. sunlight
Your answer is D.
Chlorophyll traps in the sunlight needed for the process known as 'photosynthesis' .
how many moles of aluminum metal are needed to produce 3.33 moles of aluminum chloride?
To produce 3.33 moles of aluminium chloride, you would need 3.33 moles of aluminium metal.
Explanation:To find the number of moles of aluminium metal needed to produce 3.33 moles of aluminium chloride, we need to use the stoichiometry of the balanced chemical equation.
From the equation: [tex]2AlCl3 + 3H2O(l) -- Al2O3 + 6HCl(g[/tex],
we can see that 2 moles of AlCl3 are produced from 2 moles of aluminium.
Therefore, in order to produce 3.33 moles of AlCl3, we would need 3.33 moles of aluminium.
3.33 moles of aluminum metal are needed to produce 3.33 moles of aluminum chloride.
To determine how many moles of aluminum metal are needed to produce 3.33 moles of aluminum chloride, we need to look at the balanced chemical equation for the reaction between aluminum and chlorine:
[tex]\[ 2Al + 3Cl_2 \rightarrow 2AlCl_3 \][/tex]
From the balanced equation, we see that 2 moles of aluminum (Al) produce 2 moles of aluminum chloride (AlCl₃). This means there is a 1:1 molar ratio between aluminum and aluminum chloride in the reaction.
Given that we need to produce 3.33 moles of aluminum chloride (AlCl₃), we can use the 1:1 ratio to find the moles of aluminum needed:
[tex]\[ \text{Moles of Al needed} = \text{Moles of AlCl}_3 \][/tex]
Therefore:
[tex]\[ \text{Moles of Al needed} = 3.33 \text{ moles of AlCl}_3 \][/tex]
So, 3.33 moles of aluminum metal are needed to produce 3.33 moles of aluminum chloride.
0.1 gram mixture of solid substances containg sodium hydroxide and sodium chloride was titrated with 0.1 molar hydrochloric acid the complete reaction takes place by consumption of 10 mlof the acid calculate the percentage of sodium hydroxide in the mixture
Answer:
yes
Explanation:
yes
I need help with balancing equations I'm doing homework and idk what to do here can you give me the answers please lol
It's pretty easy to balance equations! Basically you want to make sure that the number of each compound is equal on both sides of the arrow.
For example number one is
Fe + H2SO4 -> Fe2(SO4)3 + H2
A 3 in front of H2SO4 because there's a subscript of 3 on the right side.
Then a 3 in front of H2 because of the previous step.
Then add a 2 in front of Fe because of the 2 subscript in Fe2(SO4)3
Then add a 1 in front of Fe2(SO4)3 because you already have an equal number of each element.
2Fe + 3H2SO4 -> 1Fe2(SO4)3 + 3H2
I hope this explanation helps! You should really do your homework because practice is everything when it comes to chemistry. You'll need to know how to do it for exams.
what is the relstionship between a mutatation and gene
Answer:
D
Explanation:
as levels of carbon dioxide increase in the atmosphere, we could expect oceanic carbon dioxide levels to _____ and oceanic pH to _____ .
Answer:
increase; decrease
Step-by-step explanation:
The oceans absorb 25 % to 30 % of CO₂ emissions quickly and about 85 % in the long term.
Thus, carbon dioxide levels in the ocean increase.
=====
Dissolved CO₂ is involved in several equilibria.
(1) CO₂(g) ⇌ CO₂(aq)
(2) CO₂(aq) + H₂O(ℓ) ⇌ H₂CO₃(aq)
(3) H₂CO₃(aq) + H₂O(ℓ) ⇌ HCO₃⁻(aq) + H₃O⁺(aq)
(4) HCO₃⁻(aq) + H₂O(ℓ) ⇌ CO₃²⁻(aq) + H₃O⁺(ℓ)
Reaction(3) accounts for most of the increase in hydronium ion concentration.
pH = -log[H₃O⁺]
As [H₃O⁺] increases, pH decreases.
Sea surface pH has decreased from 8.25 to 8.07 since the Industrial Revolution. This corresponds to a 50% increase in hydronium ions in the oceans.
We can see these effects in the NOAA graph below.
As atmospheric CO₂ levels rise, oceanic CO₂ also increases, leading to a decrease in oceanic pH, a process termed ocean acidification. This results in a reduction in carbonate ions, making it more difficult for marine life to produce hard exoskeletons and shells, especially for organisms such as corals and shellfish.
As levels of carbon dioxide (CO₂) increase in the atmosphere, we can expect oceanic carbon dioxide levels to increase and oceanic pH to decrease. This process, known as ocean acidification, leads to a significant reduction in the availability of carbonate ions, which are critical for marine organisms such as shellfish and corals to produce their hard exoskeletons and shells.
As a result, these organisms have to expend more energy to maintain their structures and are at higher risk of dissolution and weakening under the more acidic conditions.
The increase in ocean acidity poses serious threats to marine ecosystems and can hinder the growth and structural integrity of organisms that rely on calcium carbonate. With increased acidity by about 25% since the pre-industrial era, the ability of these organisms to produce calcium carbonate is diminished.
Moreover, if atmospheric CO₂ concentrations continue to rise, the situation may worsen, leading to further decreases in ocean pH and potentially causing corals to become rare by 2050 due to reduced calcification rates.