Answer:
In creating music, sound waves from the singer in the form of vibrational energy strikes and is converted into electrical signals in the microphone.
These electrical signals are converted to a magnetic field and then stored on an analogue recorder in the form of magnetic domains.
When the song is replayed, these magnetic domains create a changing magnetic field which produces electrical signal.
The electrical signal is sent to the voice coil in the speaker, where it is converted to a magnetic field.
The changing magnetic field pulls and push on the diaphragm which sets the air around it into vibration.
This vibration becomes sound wave that strikes our ears when we listen to these sounds.
What to types of eukaryotes does not photosynthesize.
PLZ HELP I NEED QUICKLY
Answer:
plastids
Explanation:
chloroplasts, chromoplast and leucoplasts, that all conduct photosynthesis
The wavelength and energy of a wave are inversely proportional. Based on this, which wave listed would have the LOWEST energy.
A) wave with wavelength of 600 m
B) wave with wavelength of 600 cm
C) wave with wavelength of 600 mm
D) wave with wavelength of
Answer:it is a
Explanation:
How many grams of H2O will be produced if 750 grams of Fe are produced?
Fe3O4+ H2 → Fe+H2O
Answer:
Roughly 323g of H2O.
Explanation:
Balance your chemical equation:
1 Fe3O4 + 4H2 → 3 Fe + 4 H2O
Modulate your stoichiometry 4 steps:
[tex]750g \times \frac{1mol}{55.8g} \times \frac{4mol}{3mol} \times \frac{18g}{1mol} = \\ = \frac{54000}{167.4} = \\ = 322.581g[/tex]
To calculate the atoms of an element in a given molecule, we need to multiply stoichiometry by the number that is written on the foot of that element. Therefore, 180g of H2O will be produced if 750 grams of Fe are produced.
What is stoichiometry?Stoichiometry is a part of chemistry that help us in making relationship between reactant and product from quantitative aspects.
The balanced equation is
Fe[tex]_3[/tex]O[tex]_4[/tex]+ 4H[tex]_2[/tex] → 3Fe+ 4H[tex]_2[/tex]O
Molar mass of Fe=55.845 g/mol
mass of Fe=750 grams
Moles of Fe=13.4moles
The mole ratio between water and Fe is 3:4.
moles of H[tex]_2[/tex]O produced=(3/4)×13.4moles=10.0
Mass of H[tex]_2[/tex]O produced=molar mass of H[tex]_2[/tex]O × number of moles of H[tex]_2[/tex]O
Mass of H[tex]_2[/tex]O produced=18× 10.0
Mass of H[tex]_2[/tex]O produced=180g
Therefore, 180g of H2O will be produced if 750 grams of Fe are produced.
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How many moles of magnesium oxide are produced when 7 moles of Mg are reacted ?
Moles are produced when there is magnesium Explanation:
The half life of carbon-14 is 5,730 years. ABOUT how old is a sample that has one-fourth of its carbon-14 unchanged?
a.10,000 years
b.15,100 years
c.11,400 years
d.5,700 years
Answer:
C. 11400 years.
Explanation:
The time constant of the isotope is:
[tex]\tau = \frac{5730\,yr}{\ln 2}[/tex]
[tex]\tau = 8266.643\,yr[/tex]
The decay of the isotope is described by the following model:
[tex]\frac{m(t)}{m_{o}} = e^{-\frac{t}{\tau} }[/tex]
[tex]-\frac{t}{\tau} = \ln \frac{m(t)}{m_{o}}[/tex]
[tex]t = -\tau \cdot \ln \frac{m(t)}{m_{o}}[/tex]
[tex]t = -(8266.643\,yr)\cdot \ln \left(\frac{1}{4} \right)[/tex]
[tex]t \approx 11460.001\,yr[/tex]
The right answer is C.
Consider the model of a sodium atom. An orange circle labeled upper N a is surrounded by three concentric circles. The innermost ring has dots at the north and south positions. The next ring has eight dots, evenly spaced, with dots aligning with those in the inner ring. The outermost ring has one dot at the north position. Which feature does the model show accurately?
A) the size of the electrons in different shells
B) the shapes of the orbitals in different shells
C)the distribution of electrons in different shells
D)the orientation of the orbitals in different shells
Answer:
C would be the answer.
Explanation:
Answer:
The answer is C. the distribution of electrons in different shells
Explanation:
I got it right on the test
What is the molarity of a solution with 2.1 mol of HCl in 400 mL of water? (M = mol/L)
A.) 0.00525 M
B.) 5.25 M
C.) 190 M
D.) 2.1 M
Answer:
A
Explanation:
What is the change in electrons for manganese in the following reaction?? 2 MnO 4 - ( aq ) + H 2 O 2 ( aq ) + 6 H + ( aq ) -> 2 Mn 2+ ( aq ) + 3 O 2 ( g ) + 4 H 2 O( l )
The change in electrons for manganese in the reaction is a gain of 5 electrons per atom, as it is reduced from +7 to +2 during the redox process, resulting in a total gain of 10 electrons for the two Mn atoms involved.
Explanation:The change in electrons for manganese in the given reaction is a reduction process where manganese (Mn) changes from an oxidation state of +7 to +2. Manganese is initially part of the permanganate ion, MnO4-, with an oxidation state of +7 for manganese. In the reaction with hydrogen peroxide (H2O2), manganese is reduced to Mn2+ with an oxidation state of +2.
Considering the change in oxidation state from +7 to +2, each manganese atom gains 5 electrons during the reaction. This means that for two Mn atoms, as shown in the reaction, there is a total gain of 10 electrons. This is a classic example of a redox reaction, demonstrating the change in oxidation states and the fundamental concept of electron transfer.
The air helps regulate Earth's atmosphere so that
it is not too cold or too hot for life on Earth. The
air also protects organisms from the sun's
harmful radiation. These are reasons air is an
important resource. Which of these claims
provides a major reason that air is considered an
important natural resource?
Answer:
B
Explanation:
Objects that are able to fall have what type of energy?
a.) Kinetic
b.) Radiant
c.) Potential
d.) Electrical
Answer:
kinetic energy
Explanation:
because of the movement of gravity and space
What type of bond will form when P and O2 react?
P + O2 → P4O10
Answer:
The answer is covalent bonding.
Explanation:
When both non-metals react, they will form Covalent bond .
When metals react with non-metal, they form Ionic bond .
When phosphorus (P) reacts with oxygen (O2), they form covalent bonds to create phosphorus pentoxide (P4O10), a chemical bond formed by the sharing of electron pairs between atoms.
Explanation:When phosphorus (P) reacts with oxygen (O2), it forms a compound called phosphorus pentoxide (P4O10). The type of bond formed in this reaction is a covalent bond. A covalent bond is a chemical bond formed by the sharing of electron pairs between atoms. In this case, phosphorus and oxygen share electrons to achieve a stable electron configuration. Phosphorus needs 3 more electrons to complete its outer shell, while oxygen needs 2 more. So, they share electrons mutually to meet their requirements, forming covalent bonds.
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question about corona
Answer:
public health
Answer: Clean water is important to (public health). Diseases can spread through cities due to unclean water.
Explanation: I hope this helps!
PLEASE HELP ASAP I WILL MARK BRAINLIEST!! THANK YOU
Given that each of the following compounds has six carbons, which has the most hydrogens?
Select one:
a. alkane
b. alkene
c. alkyne
d. benzene
Answer:
Pretty sure that its benzene
How many moles of H2SO4 are needed to prepare 200 mL of a 1.0 M solution?
Consider the following balanced reaction:
4NH3 (g) + 502 (g) – 4NO (g) + 6H20 (g)
How many grams of ammonia are required to react completely with 40 g of oxygen?
A. 154
B.
179
C. 34 g
D.
19 g
Answer:
17g
Explanation:
4NH3 (g) + 502 (g) –> 4NO (g) + 6H20 (g)
Mass of O2 mole = 32g
Therefore 5O2 = 160g
Mass of NH3 mole = 17g
Therefore 4NH3 = 17 x 4 =68g
Required amount of NH3 = 68 x 40/160 = 17g
A 200.9-mL intravenous (IV) solution contains 5.10 g of glucose (C6H12O6). What is the molarity of this solution?
The molarity of the solution is approximately 0.141 M. To find the molarity of the solution, we first need to calculate the number of moles of glucose present in the solution using the given mass of glucose and its molar mass.
The molar mass of glucose (C6H12O6) can be calculated by adding the atomic masses of its constituent atoms:
[tex]\[ \text{Molar mass of glucose} = 6 \times \text{Atomic mass of C} + 12 \times \text{Atomic mass of H} + 6 \times \text{Atomic mass of O} \][/tex]
Using the atomic masses provided by the periodic table:
[tex]\[ \text{Molar mass of glucose} = 6 \times 12.01 \, \text{g/mol} + 12 \times 1.01 \, \text{g/mol} + 6 \times 16.00 \, \text{g/mol} \][/tex]
[tex]\[ = 72.06 \, \text{g/mol} + 12.12 \, \text{g/mol} + 96.00 \, \text{g/mol} \][/tex]
[tex]\[ = 180.18 \, \text{g/mol} \][/tex]
Now, we can calculate the number of moles of glucose using the given mass of glucose:
[tex]\[ \text{Number of moles of glucose} = \frac{\text{Mass of glucose}}{\text{Molar mass of glucose}} \][/tex]
[tex]\[ = \frac{5.10 \, \text{g}}{180.18 \, \text{g/mol}} \][/tex]
[tex]\[ \approx 0.0283 \, \text{mol} \][/tex]
Next, we calculate the volume of the solution in liters:
[tex]\[ \text{Volume of solution} = 200.9 \, \text{mL} \times \frac{1 \, \text{L}}{1000 \, \text{mL}} \][/tex]
[tex]\[ = 0.2009 \, \text{L} \][/tex]
Now, we can find the molarity of the solution using the formula:
[tex]\[ \text{Molarity} = \frac{\text{Number of moles of solute}}{\text{Volume of solution in liters}} \][/tex]
[tex]\[ = \frac{0.0283 \, \text{mol}}{0.2009 \, \text{L}} \][/tex]
[tex]\[ \approx 0.141 \, \text{M} \][/tex]
Therefore, the molarity of the solution is approximately 0.141 M.
How much energy is required to melt a 9.070kg (convert to grams first: 1kg=1000g) bag of ice at 0ºC? Write the formula and write answer with unit.
Answer:
The energy required to melt 9.070 kg of ice is 3047520 J
Explanation:
The mass, m of the ice = 9.070 kg = 907.0 g
The latent heat of fusion, [tex]L_f[/tex]° for ice = 3.36×10⁵ J/Kg
Therefore we have the formula for the energy required to melt the mass m equals
[tex]\Delta H = m \times L_f[/tex]
Plugging in the values, we have;
ΔH = 3.36 × 10⁵ J/Kg×9.070 kg = 3047520 J or
ΔH = 3.36 × 10² J/g×9070 g = 3047520 J
Therefore, the energy required to melt 9.070 kg of ice = 3047520 J.
If the pH of the solution is 7.65, what is the concentration of hydronium ion [H3O+]?
Answer:
.000000022
Explanation:
H3O+=10^-pH
- Hope that helps! Please let me know if you need further explanation.
Which diagram best illustrates the stage in the formation of the solar system at which the sun formed?
Answer:
A
Explanation:
Every thing was first a bunch of gas.
A solution is prepared by mixing 38.0L of pyrimidine and 442.0L of water. What is the percent volume of pyrimidine in this solution?
Answer: 7.92%
Explanation:
I just answered the question and got it correct.
There is a golden role of solubility, polar solute dissolve in polar solvent and non polar solute dissolve in non polar solvent. Therefore, the percent volume of pyrimidine in this solution is 79.1%.
What is solution?Solutions are a homogeneous mixture of two or more substances. A solution is a homogeneous mixture of solvent and solute molecules. Solvent is a substance that is in large amount in solution. solute is the substance which is in small amount in a solution.
percent volume=(Volume of Solute/Volume of Solution)×100
Volume of Solute=38.0L
Volume of Solution= 442.0L + 38.0L=480L
substituting all the given values in the above equation, we get
percent volume=(38.0L/480L)×100
percent volume = 79.1%
Therefore, the percent volume of pyrimidine in this solution is 79.1%.
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explain why biodiversity is important. You must have 6 sentences and at least 1 example of biodiversity.
Biodiversity is vital for ecosystem resilience, economic benefits, and human health, with examples like the Amazon rainforest illustrating its importance. Biodiversity also provides essential genetic resources for breeding and holds undiscovered potential for scientific advancement.
Biodiversity is paramount due to its extensive benefits to ecosystems, the economy, and human health. With over 5 million known species, biodiversity contributes to the resilience of ecosystems, allowing them to recover from disturbances and providing a buffer against catastrophic events. An example of biodiversity is the Amazon rainforest, where a vast number of species coexist, each playing a role in maintaining the ecological balance. Economic benefits stem from biodiversity's direct provision of food, medicine, and raw materials, many of which we are yet to fully discover and understand. Biodiversity also ensures the availability of genetic resources which are crucial for crop and livestock breeding, leading to food security. Our current lack of knowledge about so many species indicates there is much more to learn, including potential breakthroughs in science and medicine that could enrich human life.
How many miles of copper, Cu, are in 19.2g of copper
Magnesium reacts with hydrochloric acid (HCl) as follows. How many milliliters of hydrogen gas are produced by the reaction 0.020 mol of magnesium with excess of hydrochloric acid at STP? Make sure to use the correct number of significant digits. 0.448 mL 0.45 mL 448 mL 450 mL
Answer:
The answer IS NOT 448
it might be 0.448 but im not sure
Explanation:
i trusted the person above and it was incorrect so wanted to let yall know its not c
What factor besides temperature affects the boiling point of water?
A. Mass
B. Volume
C. Pressure
D. Number of moles
Answer: C. Pressure
Explanation:
A student is observing different structures of a seed plant during a lab activity. She has identified tiny structures that look like powder.
Which structures did the student most likely identify?
Please hurry!! i will try to give brainly to the first person to answer correctly
Which of the following explains the process of radiation?
when heat gets transferred through objects that are touching
when the measurement of heat in the atmosphere goes down
when heat gets transferred through electromagnetic waves that move through
space
when heat gets transferred through a liquid or a gas
Answer:
RADIATION IS THE PROCESS WHERE HEAT IS TRANSFERRED THROUGH ELECTROMAGNETIC WAVES THAT MOVE THROUGH SPACE.
Explanation:
Radiation is the transfer of energy in the form of waves through space or a material medium. It involves the emission of energy through electromagnetic waves such as radio waves, x-rays, gamma rays. Also, particles such as electrons, protons and neutrons are regarded as radiations when they travel at high velocities. Radiation are categorized into two; ionizing and non-ionizing radiations depending on the energy the matter carries. In ionizing radiation, matters carry sufficient energy which can be used to ionize atoms or molecules and even break chemical bonds; charged particles or ions are therefore produced in matter and such radiations include gamma rays, x-rays, alpha particles, beta particles.
'B. When heat gets transferred through electromagnetic waves that move through space' explains the process of radiation.
Radiation is a method of heat transfer that does not require any medium. This means that heat energy can travel through the vacuum of space. The Sun warming the Earth is a perfect example of radiation. Here’s how it works step-by-step:
Emission of Electromagnetic Waves: A hot object, such as the Sun, emits electromagnetic waves, which may include infrared radiation, visible light, and others.
Travel Through Space: These electromagnetic waves travel through the vacuum of space; no particles are needed to carry this energy.
Absorption: When these waves reach another object, like Earth, they get absorbed by the object’s surface, warming it up.
Different types of electromagnetic waves include radio waves, microwaves, infrared radiation, visible light, ultraviolet radiation, X-rays, and gamma rays. Each type carries energy and can transfer heat through radiation.
What is a compound?
a combination of two or more substances that
are not chemically combined
O a combination of two or more elements that
are combined in a certain ratio
What is a solution?
a mixture of two or more substances that are
mixed evenly throughout
a mixture of two or more substances that are
chemically combined
DONE
Answer:
1) B 2) A
Explanation:
just did it on edg 2020
What determines the color of a rock?
O texture
O grain pattern
O mineral type
O grain shape
The color of a rock is determined by the type of mineral it contains. The presence of certain elements and the way light interacts with these minerals can influence the color. While other factors like texture or grain pattern may affect appearance, they do not fundamentally determine the color.
Explanation:The color of a rock is primarily determined by its mineral type. Different minerals have different colors due to various factors like the way light reflects off their surfaces, their structure, and the presence of certain elements. For example, quartz can be clear or cloudy white, obsidian is a dark, glossy black, and amethyst, a type of quartz, is purple due to the presence of iron. While the texture, grain shape or pattern may affect the overall appearance of a rock, it's the mineral content that fundamentally determines its color.
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Which allele is recessive?
A. What is the solubility in grams for HCl at 40℃?
B. What is the temperature that 65g of NH4Cl reaches solubility?
C. What is the solubility in grams for SO2 at 20℃?
D. Which compound reaches a solubility of 40 g at a temperature of 100℃?
The term solubility has to do with the ability of a solute to dissolve in a solvent.
What is solubility?The term solubility has to do with the ability of a solute to dissolve in a solvent. The solubility of a solute can be obtained by reading of the solubility curve.
The answers to the questions are;
The solubility of HCl at 40° is 60 g/100g of waterThe solubility of SO2 at 20℃ is 10g/100g of waterThe compound that reaches a solubility of 40 g at 100℃ is NaCl.Learn more about solubility:https://brainly.com/question/13110055?
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