What two elements comprise most of a nebula? question 5 options: hydrogen and helium hydrogen and nitrogen oxygen and hydrogen carbon and hydrogen helium and lithium?

Answers

Answer 1

hydrogen and helium and the most abundant elements in a nebula.

Related Questions

Question 8 4 pts What would be the resulting molarity of a solution made by dissolving 31.3 grams of Ca(OH)2 in enough water to make a 1050-milliliter solution? Show all of the work needed to solve this problem.

Answers

Answer is: molarity of a solution is 0,401 M.
m(Ca(OH)₂) = 31,3 g.
n(Ca(OH)₂) = m(Ca(OH)₂) ÷ M(Ca(OH)₂).
n(Ca(OH)₂) = 31,3 g ÷ 74 g/mol.
n(Ca(OH)₂) = 0,422 mol.
V(solution) = 1050 mL · 0,001 L/mL = 1,050 L.
c(Ca(OH)₂) = n(Ca(OH)₂) ÷ V(solution).
c(Ca(OH)₂) = 0,422 mol ÷ 1,050 L.
n(Ca(OH)₂) = 0,401 mol/L = 0,401 M.

Answer : The molarity of the solution is, 0.4028 mole/L

Explanation : Given,

Mass of [tex]Ca(OH)_2[/tex] = 31.3 g

Molar mass of [tex]Ca(OH)_2[/tex] = 74 g/mole

Volume of solution = 1050 ml

Molarity : It is defined as the moles of solute present in one liter of solution.

Formula used :

[tex]Molarity=\frac{\text{Mass of }Ca(OH)_2\times 1000}{\text{Molar mass of }Ca(OH)_2\times \text{volume of solution in ml}}[/tex]

Now put all the given values in this formula, we get:

[tex]Molarity=\frac{31.3g\times 1000}{74g/mole\times 1050ml}=0.4028mole/L[/tex]

Therefore, the molarity of the solution is, 0.4028 mole/L

What is the square root of 54554? What is the square root of 35654?

Answers

√54554 = 233,56.
√35654 = 188,82.
Square root of a number x is a number y and equation for y is y = x² or x is square of number y, multiplying y by itself, y·y.
For example, 5 and −5 are square roots of 25 because 5² = (−5)² = 25. The principal square root is every nonnegative real number with a unique nonnegative square root.

how many moles of gas sample are 5.0 L container at 373K and 203kPa

Answers

For the purpose we will here use the ideal gas law:

p×V=n×R×T

V= 5.0 L

T= 373K

p= 203kPa

R is universal gas constant, and its value is 8.314 J/mol×K

Now when we have all necessary date we can calculate the number of moles:

n=p×V/R×T

n= 203 x 5 / 8.314 x 373 = 0.33 mole

Final answer:

To calculate the number of moles of a gas sample in a 5.0 L container at 373 K and 203 kPa, one uses the Ideal Gas Law. By substituting the appropriate values into the equation and solving for 'n', the calculation yields approximately 0.328 moles of the gas under the specified conditions.

Explanation:

The question asks how many moles of a gas sample are in a 5.0 L container at 373 K and 203 kPa. To find the number of moles of gas, we use the Ideal Gas Law, which is PV = nRT. In this formula, P is the pressure (in kPa), V is the volume (in liters), n is the number of moles, R is the ideal gas constant (8.314 J/(mol·K) or 8.314 L·kPa/(mol·K)), and T is the temperature (in Kelvin).

First, we convert the pressure into kPa since R is given in L·kPa/(mol·K). The pressure is already in kPa. Then, we solve for 'n' (number of moles):

P = 203 kPa

V = 5.0 L

R = 8.314 L·kPa/(mol·K)

T = 373 K

Using the Ideal Gas Law:

n = PV / RT = (203 kPa × 5.0 L) / (8.314 L·kPa/(mol·K) × 373 K)

n = 1015 / 3093.402 = 0.328 mol

Thus, under the given conditions, the 5.0 L container holds approximately 0.328 moles of the gas sample.

Which of the following is a mixture?

sand
silicone
silicon dioxide
carbon dioxide

Answers

Hello,

Here is your answer:

The proper answer to this question is A "sand". Sand is a mixture!

Your answer is A.

If you need anymore help feel free to ask me!

Hope this helps!

The following term that is a mixture is answer A. Sand. Sand is a easy mixture, and a very safe one too. If you mix oxygen with carbon dioxide, both are noncombustible, but the oxygen will help a fire start.

I hope you're doing well! Please if you could mark me brainliest?.

Enter the net ionic equation representing solid chromium (iii) hydroxide reacting with nitrous acid. express your answer as a balanced net ionic equation. identify all of the phases in your answer.

Answers

Final answer:

The net ionic equation for the reaction between solid chromium(III) hydroxide and nitrous acid is Cr(OH)3(s) + 3 H+(aq) → Cr3+(aq) + 3 H2O(l), after removing the spectator nitrate ions.

Explanation:

The question involves writing a net ionic equation for the reaction between solid chromium(III) hydroxide and nitrous acid. To start, write down the full balanced molecular equation:

Cr(OH)3(s) + 3 HNO2(aq) → Cr(NO3)3(aq) + 3 H2O(l)

Now write the full ionic equation:

Cr(OH)3(s) + 3 H+(aq) + 3 NO2⁻(aq) → Cr3+(aq) + 3 NO2⁻(aq) + 3 H2O(l)

Notice that the nitrate ions (NO2⁻) are present on both sides of the equation and thus are spectator ions. Removing the spectator ions gives us the net ionic equation:

Cr(OH)3(s) + 3 H+ (aq) → Cr3+ (aq) + 3 H2O(l)

It's important to verify that both sides of the equation are balanced with respect to both charge and mass. The equation above satisfies this requirement, with three positive charges on both sides and the same number of each type of atom on each side.

Final answer:

The net ionic equation for the reaction of solid chromium (iii) hydroxide with nitrous acid is Cr(OH)₃(s) + 3 HNO₂(aq) → Cr₃+(aq) + 3 NO₂−(aq) + 3 H₂O(l).

Explanation:

The net ionic equation for the reaction of solid chromium (iii) hydroxide with nitrous acid is:

Cr(OH)₃(s) + 3 HNO₂(aq) → Cr₃+(aq) + 3 NO₂−(aq) + 3 H₂O(l)

First, solid chromium (iii) hydroxide reacts with nitrous acid to form chromium ions, nitrite ions, and water.

In this reaction, the hydroxide ions combine with the hydrogen ions from the acid to produce water, and chromium (iii) hydroxide dissolves to leave behind chromium ions in solution.

Since chromium (iii) hydroxide is a weak base and does not dissociate into ions in its solid state, it is included as a whole compound in the net ionic equation. The nitrite ions and chromium ions remain in solution, indicating a chemical change has occurred.

Which bond has the greatest ionic character? A) H-Cl B) H-F c) H-O d) H-N

Answers

I really hope that this helps. H-F because the difference in electronegativity is the greatest, about 1.9 on the Pauling scale. The term means which bond has the greatest polarity and is thus most similar to an ionic bond, which involves the transfer of an electron (in opposition to covalent bonds, which share electrons). It is H-F because out of all the atoms here bonded with H, ie hydrogen, F is the most electronegative which means it can pull the bonded electrons to itself more than can Cl, O, and N. That means a stronger polarization of the electron cloud forming the bond with hydrogen and therefore a stronger ionic character.

87 g of oxygen gas would occupy how many liters of volume at stp

Answers

number of mole : mass/ molar mass

87g/ (2 x 16) = 2.719 mol

volume = number of mole x molar volume
volume = 2.719 x 22.4
volume = 60.906 L

What volume of a 3.00 M KI stock solution would you use to make 0.195 L of a 1.25 M KI solution?

Answers

For the purpose we will use solution dilution equation:
c1xV1=c2xV2
Where, c1 - concentration of stock solution; V1 - a volume of stock solution needed to make the new solution; c2 - final concentration of new solution; V2 - final volume of new solution.
c1 = 3.00 M
c2 = 1.25 M
V1 = ?
V2 = 0.195 L
When we plug values into the equation, we get following:
3 x V1 = 1.25 x 0.195
V1 = 0.08 L

The volume of the 3.00 M KI stock solution needed to prepare 0.195 L of a 1.25 M KI solution is 81.25 mL.

The student is asking how to calculate the volume of a stock solution needed to make a diluted solution of a different concentration. The problem can be solved using the dilution equation C1V1 = C2V2, where C1 and V1 are the concentration and volume of the stock solution, respectively, and C2 and V2 are the concentration and volume of the diluted solution, respectively. For this particular question:

C1 = 3.00 M (stock solution concentration)

V2 = 0.195 L (volume of the desired diluted solution)

C2 = 1.25 M (desired concentration of the diluted solution)

To find V1, the volume of the stock solution, we rearrange the equation to:

V1 = (C2 * V2) / C1

V1 = (1.25 M * 0.195 L) / 3.00 M

V1 = (0.24375) / 3.00

V1 = 0.08125 L or 81.25 mL

Bases in solution produce what type of ions?

A. sulfide ions
B. chloride ions
C. hydroxide ions
D. hydronium ions

Answers

If they are a Bronsted-Lowry base they will produce hydroxide ions.

A certain weak acid, HA, has a Ka value of 1.8×10−7.
Part A
Calculate the percent dissociation of HA in a 0.10 M solution.

Answers

Formula for Equilibrium: HA <---> H+ + A-

To find Ka = [H+][A-]/[HA]
[HA] = 0.10,
[H+] = [A-] = x

Solve for Ka

Ka = 1.8X10^-7 = x^2 / 0.10
x = 1.3X10^-4 M = [A-]

% Dissociation =
([A-]/[HA]) X 100 = (1.3X10^-4 / 0.10) X 100 = 0.13% ionized

Answer is 0.13%.

Is bioluminescence an endothermic process bioluminescence an endothermic process or exothermic process?\?

Answers

Bioluminescence is a chemical reaction that takes place in a living organism when the organism emits light. Bioluminescence doesn't consume or produce heat, hence it can be neither endothermic nor exothermic reaction. It emits a heatless light not heat.
For bioluminescence, it could be said that it is an exoenergetic reaction because it uses energy from a chemical reaction to produce light.

In the reaction shown above, 2.00 x 10^3 g caco3 produce 1.05 x 10^3 g of cao, what is the percent yield?

Answers

first, we have to get the theoretical yield of CaO:
the balanced equation for the reaction is:
CaCO3(s)→CaO(s) +CO2(g)
covert mass to moles:
moles CaCO3 = mass of CaCO3 / molar mass of CaCO3
= 2x10^3 /100 = 20 moles
the molar ratio between CaCO3 : CaO = 1:1
∴moles of CaO = 1* 20 = 20 moles
∴mass of CaO = moles of CaO * molar mass of CaO
= 20 * 56 = 1120 g
∴the theoritical yield = 1120 g and we have the actual yield =1.05X10^3
∴Percent yield = actual yield / theoritical yield *100
= (1.05x10^3) / 1120 * 100
= 94 %

Dextrose 25% 1000 ml was ordered, you have only dextrose 70% solution available. how much of the dextrose 70% solution and sterile water will you use to fill this order?

Answers

For the purpose we will use solution dilution equation:
c1xV1=c2xV2
Where, c1 - concentration of stock solution; V1 - a volume of stock solution needed to make the new solution; c2 - final concentration of new solution; V2 - final volume of new solution.
c1 = 70%
c2 = 25%
V1 = ?
V2 = 1000 mL
When we plug values into the equation, we get following:
70 x V1 = 25 x 1000
V1 = 333.33 mL
V(H2O)=V2-V1= 1000-333.33=666.67 mL

A large Ka favors the _____.
production of hydronium ions
production of hydroxide ions
reaction of hydronium ions
reaction of hydroxide ions

Answers

The first one, "Production of hydronium ions."

the large Ka favors the production of hydronium ions

In an experiment, an unknown gas effuses at one-half the speed of oxygen gas, which has a molar mass of 32 g/mol. which might be the unknown gas?

Answers

If we assume the rate of diffusion of oxygen is 1 , then that of the unknown gas is 1/2.
From the Grahams law of diffusion;
R1/R2= √mm2/√mm1
1/0.5 = √mm2/√32
4 = mm2/32
mm2 = 128
Therefore the molecular mass of the unknown gas i 128 g/mol
I therefore think the gas is Hydrogen iodide
since, H=1, I= 127 , thus HI = 128 g/mol

How many grams are in 4.5 moles of lithium oxide?

Answers

take the amu of Li which is 6.94 then multiply by two.=13.88 then grab the amu of O= 15.999 add these together and and you should get a number = 28.879

PLEASE HELP!!

1. Which of these is the balanced equation for this reaction?
A. V2O5 + HCl ? VOCl3 + H2O
B. V2O5 + HCl ? 2VOCl3 + 3H2O
C. V2O5 + 3HCl ? 2VOCl3 + H2O
D. V2O5 + 6HCl ? 2VOCl3 + 3H2O

2. __N2 + __O2 + __H2O ? __HNO3
What coefficient values will balance the reaction?
A. 2,5,2,4
B. 2,2,2,2
C. 2,2,1,2
D. 1,3,1,2

3.The chemical formula of a compound can tell you -
A. the proportions of elements in the compound.
B. the three-dimensional structure of the compound.
C. the type and arrangement of bonds in the compound.
D. the properties of the elements in the compound.

4.The reaction equation below shows the formation of aluminum oxide. Which set of coefficients balances the equation? Al + O2 ?Al2O3
A. 1,1,1
B. 2,3,5
C. 2,4,5
D. 4,3,2

5.Which of the following is the balanced equation for this process?
A.2NH4NO3? 2N2 + O2 + 4H2O
B.NH4NO3? N2 + 3O2 + H2O
C.2NH4NO3? N2 + O2 + 3H2O
D.2NH4NO3? N2 + 3O2 + 2H2O

Answers

1) The answer is D. V2O5 + 6HCl = 2VOCl3 + 3H2O.

V2O5 + HCl = VOCl3 + H2O

V=2 V=1
0=5 O=3
H=1 H=2
Cl=1 Cl=3

The equation is not balanced because on the left side there is 2 vanadium (V) atoms, 5 oxygen (O), 1 hydrogen (H) and 1 chlorine (Cl) atoms. In the right side, there is 1 vanadium (V) atom, 3 oxygen (O), 2 hydrogen and 3 chlorine (Cl) atoms.
To balance the chemical equation we need place a coefficient of 6 in front of HCl, a coefficient of 2 in front of VOCl3 and coefficient 3 of in front of H2O.

2) The answer is A. 2,5,2,4

2N2(g) + 5O2(g) + 2H2O = 4HNO3(aq)

This is a redox reaction because there has been a change in the oxidation states of nitrogen and oxygen, and it has to be balanced over half-reaction method:

N⁰ ⇒ N⁺⁵ + 5e⁻ / x2
2e⁻ + O⁰ ⇒ O⁻² / x5

2N⁰ ⇒ 2N⁺⁵ + 10e⁻
10e⁻ + 5O⁰ ⇒ 5O⁻²

Now it only remains to count how many hydrogens miss.

3) The chemical formula of a compound can tell you - A. the proportions of elements in the compound.

Chemical formulas are the symbols of chemical compounds, the form of displaying their molecules; in addition to the qualitative composition, they also show the quantitative ratio of the atoms constituting the molecule of the chemical compound. Formulas are expressed by chemical symbols; for example. molecules of the chemical compound of water are composed of two hydrogen atoms and one oxygen atom, so the molecular formula is H2O water.

4) The answer is D. 4,3,2.

4Al + 3O2 = 2Al2O3

This is a redox reaction because there has been a change in the oxidation states of aluminum and oxygen, and it has to be balanced over half-reaction method:

Al⁰ ⇒ Al⁺³ + 3e⁻ / x4
4e⁻ + O₂⁰ ⇒ 2O⁻² / x3

4Al⁰ ⇒ 4Al⁺³ + 12e⁻
12e⁻ + 3O₂⁰ ⇒ 6O⁻²

5) The answer is A. 2NH4NO3 = 2N2 + O2 + 4H2O

This is a redox reaction because there has been a change in the oxidation states of nitrogen and oxygen, and it has to be balanced over half-reaction method:

N⁺⁵ + 5 e⁻ ⇒ N⁰
N⁻³ ⇒ N⁰ + 3 e⁻
O⁻² ⇒ O⁰ + 2 e⁻

In the reaction, there are 2 species of nitrogen N⁺⁵ and N⁻³, the first is reduced and the second oxidized.

which element is a noble gas: Ne, Br, or O

Answers

the answer is Ne Neon!!!!!!!!!!!!!!

Answer:

_+_

Explanation:

Which practice is a sustainable method of food production?

A. Using drip irrigation systems to conserve water
B. Allowing chemical pollutants to build up in soil
C. Creating a monoculture crop over large areas
D. Practicing high-density livestock farming

Answers

The appropriate answer is a. using drip irrigation systems to conserve water. Drip irrigation allows water for plant growth to be delivered right to the root of the plant. This has more benefits than just simple water conservation.

Allowing pollutants to build up in soil will over time destroy the soil structure and affect soil fauna which are essential in crop growth. Mono culture is not a sustainable practice because different crops use different minerals in different proportions. Overtime the soil constantly exposed to one crop all the time will loose fertility. High density livestock rearing has many disadvantages. Some include easy spread of disease, meat contamination and the large amount of waste to manage. This practice is also inhumane.

The answers a (apex)

Can you dissolve .35 moles of Potassium Permanganate (KMnO 4 ) into 500 mL of water? _________ Why? / Why not? (please show work)

Answers

When we know that the solubility of KMnO4 is 6.4 g/100mL
so 6.49 g → solve in 100mL
? ← solve in 500mL
the amount of KMO4 soluble in 500mL = (500X 6.49) /100 = 32.45 g
and when we have the molar mass of the KMnO4 = 158/mol
we can get the number of moles of KMnO4 = mass of KMnO4 / molar mass of KMnO4
no.of moles of KMnO4 = 32.45 / 158 = 0.2 mol

when the no.of moles is less than 0.35 ∴KMnO4 will not dissolve because the number of moles is less than 0.35 mol that given in the question.

Final answer:

Yes, you can dissolve 0.35 moles of Potassium Permanganate (KMnO4) into 500 mL of water.

Explanation:

To answer whether you can dissolve 0.35 moles of Potassium Permanganate (KMnO4) into 500 mL of water, we need to consider the solubility of the compound. Potassium Permanganate is highly soluble in water, with a solubility of about 7 g per 100 mL of water at room temperature. The molar mass of KMnO4 is 158.034 g/mol, so 0.35 moles would weigh 55.3119 g. Since you have 500 mL of water, which is about 500 g, you can dissolve 55.3119 g of KMnO4 into it.

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How does wearing the headset allow an individual to drive the toy car?

Answers

It could be a vr headset and then the person isnt really driving a car

Brain signals are converted by computer software into data that move the toy car.

How much water should be added to 1 gallon of pure antifreeze to obtain a solution that is 75 %75% antifreeze?

Answers

Final answer:

This means that you need to add 1 gallon of water to 1 gallon of pure antifreeze to obtain a solution that is 75% antifreeze. To obtain a solution that is 75% antifreeze, you need to add 1 gallon of water to 1 gallon of pure antifreeze.

Explanation:

To obtain a solution that is 75% antifreeze, you need to determine how much water should be added to 1 gallon of pure antifreeze.

Let's assume that the final volume of the solution, after adding water, remains at 1 gallon.

The amount of antifreeze in the solution can be calculated using the equation:

Amount of antifreeze = Volume of antifreeze / Total volume of solution

Since the volume of the antifreeze is 1 gallon (given) and the total volume of the solution is also 1 gallon (assuming), we can calculate:

Amount of antifreeze = 1 gallon / 1 gallon = 1

This means that you need to add 1 gallon of water to 1 gallon of pure antifreeze to obtain a solution that is 75% antifreeze.

Explain why most metals are malleable and ductile but ionic crystals are not

Answers

Throughout the metallic structure allowing the atoms to slide past each other. This sliding is why metals are ductile and malleable. Ioniccompound must break bonds to slide past one another, which causes the ionic material to split and crack.

Answer:

Metals are malleable due to the layers of atoms which can move over each other. Ionic crystals are made of rigid lattice structures

Explanation:

The molecular structure of metals consists of metallic ions in a sea of de-localized electrons. The ions are closely packed in a regular arrangement. The layers of ions are held together due to the electrostatic forces between the ions and electrons. The layers of ions are not bonded to each other directly, which allows them to move when force is applied. This is why metals are malleable

Ionic crystals are strongly bonded lattice structures with oppositely charged ions strongly attracted to each other. As the ions are bonded directly to each other, the application of a force has the potential to break existing bonds, making the structure brittle.

Use the periodic table to answer this question.

Sodium reacts with chlorine gas to form sodium chloride. 2Na + Cl2 → 2NaCl

What mass of chlorine gas will react with 92.0 g of sodium?

246 g Cl2

298 g Cl2

142 g Cl2

63 g Cl2

Answers

Answer is: mass of chlorine gas is 142 grams.
Chemical reaction: 2Na + Cl₂ → 2NaCl.
m(Na) = 92,0 g.
n(Na) = m(Na) ÷ M(Na).
n(Na) = 92 g ÷ 23 g/mol.
n(Na) = 4 mol.
From chemical reaction: n(Na) : n(Cl₂) = 2 : 1.
n(Cl₂) = 4 mol ÷ 2.
n(Cl₂) = 2 mol.
m(Cl₂) = 2 mol · 71 g/mol.
m(Cl₂) = 142 g.

Which are examples of dynamic equilibrium? Check all that apply.

A cooking pot left under a dripping faucet eventually fills with water and overflows.

A person's bank account balance remains constant because income and expenses are equal.

When a small amount of sugar is added to pure water, the sugar dissolves completely.

When humidity is high, the rate at which water evaporates from the surface of a puddle is the same as the rate at which water vapor condenses from the air, so the puddle's size does not change.

Sodium moves between many different compounds during chemical reactions on Earth, but the total amount of sodium on Earth is constant.

Answers

B, D, E
A person's bank account balance remains constant because income and expenses are equal.

When humidity is high, the rate at which water evaporates from the surface of a puddle is the same as the rate at which water vapor condenses from the air, so the puddle's size does not change.

Sodium moves between many different compounds during chemical reactions on Earth, but the total amount of sodium on Earth is constant.

B, D. and E are correct

How many valance electrons (ve) does one atom of carbon have?
a. 8 ve
b. 4 ve
c. 2 ve
d. 1 ve?

Answers

a it has 8 valence electrons

How does the potential energy of the reactants compare to the potential energy of the products in an exothermic reaction, and where does the energy that is given off come from? Explain your answer in complete sentences. My reactants were Baking Soda and Vinegar.

Answers

The potential energy in reactants is higher than the potential energy of products in an exothermic reaction. Since energy is given off, the products are lower in energy than the reactants. The energy that is given off is a result of the formation of new bonds.

Answer: Potential energy of products is less than the potential energy of the reactants.

Explanation:

Exothermic reactions are defined as the reactions which releases heat. The release in heat is due to the difference in the potential energy of the reactants and the products.

For these reactions, the potential energy of the products is less than the potential energy of the reactants. Total enthalpy change of the reaction is given by the equation:

[tex]\Delta H_{rxn}=\sum H_{products}-\sum H_{reactants}[/tex]

For exothermic reaction, [tex]\Delta H_{rxn}[/tex] is negative.

For the reaction of baking soda and vinegar, the equation follows:

[tex]NaHCO_3+CH_3COOH\rightarrow CH_3COONa+CO_2+H_2O+\text{ energy}[/tex]

As, the energy is written at the product side, this means that the reaction between baking soda an=d vinegar is an exothermic reaction.

how can liquids be separated by density? a. the liquids are absorbed by paper b. the liquids are collected as they evaporate c. the liquids are allowed to separate into layers d. the liquids turn into separate vapors

Answers

c. the liquids are allowed to seperate into different layers

Answer:C

Explanation:

Which of the following represents an ion
4He
Ca
Mg
Na+

Answers

The answer is Na⁺.

Na⁺ is a positive ion of sodium that is due by the loss of one electron.
4He represents four atoms of helium. It is an idel gas, that do not form elementary molecules and exist in atom form.
Ca represent one atom of calcium and Mg one atom of magnesium. They are metals and do not form elementary molecules.

Answer:

Na+

Explanation:

Atoms may loose or gain electrons in order to attain octate.

Chemical species obtained after loosing or gaining electrons are called ions.

When an element losses electrons, positively charged ion is formed.

When an element gains electrons, negatively charged ion is formed.

Among the given, only Na+ carry a positive charge, rest are neutral.

Therefore, Na+ is an ion.

Why is charcoal black?

Question options:

Charcoal has a black-colored pigment.

Charcoal reflects black-colored light.

Charcoal absorbs all wavelengths of light that fall on it.

Charcoal reflects all wavelengths of light that fall on it.

Answers

Charcoal absorbs all wavelengths of light that fall on it.

Final answer:

Charcoal is black because it absorbs all the wavelengths of light, not reflecting any back to the eye. This is due to its porous structure and numerous carbon atoms.

Explanation:Charcoal is black because it absorbs all wavelengths of light that fall on it, rather than reflecting them. The concept of color perception lies in the range of light that an object can reflect or absorb. When an object absorbs all the colors (wavelengths) of light, it appears black to our eyes. This phenomenon is attributed to the structure of charcoal that is highly porous and contains many carbon atoms, allowing it to effectively absorb the light.

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Which are structures of the excretory system? Check all that apply. kidney spleen bladder esophagus ureter urethra Carbonyl fluoride, cof2, is an important intermediate used in the production of fluorine-containing compounds. for instance, it is used to make the refrigerant carbon tetrafluoride, cf4 via the reaction 2cof2(g)co2(g)+cf4(g), kc=8.90 if only cof2 is present initially at a concentration of 2.00 m, what concentration of cof2 remains at equilibrium? Three characteristics of the Renaissance include: Which of the following contributes to global warming?A) acid rainB) greenhouse gasesC) tropospheric ozoneD) ozone hole there are 3 steps in recycling which is the first step What did roosevelt think government should do for its citizens? In what IT pathway would you most likely need to be familiar with the system development life cycle? A.Interactive Media B.Information Support and Services C.Network Systems D.Programming and Software Development Which son of poor Scottish immigrants became one of the richest men in America as a steel tycoon? A. Henry Bessemer B. John D. Rockefeller C. Andrew Carnegie D. J. P. Morgan A brick moves across a rough surface at constant velocity. Which of the following are forces that should be included in a free body diagram? (select all that apply) gravity friction applied force force of motion like her son mrs radley is rarely seen outside how might mr radleys religious views explain this fact how many molecules of CaCl2 are equivalent to 75.9 g CaCl2 Pre-Raphaelite paintings were often based on A. religious stories. B. scenes from everyday life. C. scenes of royal and aristocratic life. D. literature. Solve the inequality. 3 + |t + 4| < 10 A. t > 3 or t < 11 B. 3 < t < 11 C. 11 < t < 3 D. t < 3 and t > 11 Elements of Swahili culture such as continue to play a major role in modern Africa, especially in Kenya and Tanzania. In at least 150 words, explain how the use of specific poetic devices makes Counting Small-boned Bodies satirical. Help me with this!!! Give two sets of potential sides for a triangle. One set of side lengths should be able to be used for a right triangle and the other set of side lengths should not be able to form a right triangle. Suppose youre making a triangle where you know the measures of two angles and the length of the side between those two angles. Write to angle measures and the length of the side between them for your triangle. You can use any measurements you want as long as they could really be used to form a triangle. An nrbc (nucleated red blood cell) is _______ a mature erythrocyte.a. less mature thanb. the same asc. more mature thand. from a different cell line than How did the agricultural revolution change the life of workers in great britain? Flying high manufacturing produces frisbees using a threeminusstep sequential process that includes molding, coloring and finishing. when the frisbees and associated costs are transferred from the molding process to the coloring process, which account is credited?