William finds a piece of pure iron in his garden. After a few days, the iron begins to rust. What are the two types of substances involved in the rusting process of iron? Iron is with one kind of atom that combines with oxygen from the air to form rust (iron oxide). Rust contains two types of atoms, which means it is .

Answers

Answer 1

Answer:

Answer:

Iron
Oxygen

Explanation:

Rusting of iron occurs during the reaction of iron and oxygen in the presence of moisture to form hydrous iron (III) oxide, which is a reddish brown substance.

By virtue of this, the atoms which are reactants in the redox reaction would e oxygen and iron.

I hope this was clear and easy to understand.

Answer 2

Answer:

like and rate <3

an element

a compound

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A balloon that had a volume of 3.50 L at 25.0°C is placed in a hot room at 40.0°C. If the pressure remains constant at 1.00 atm, what is the new volume of the balloon in the hot room?

Answers

Ideal gas law is valid only for ideal gas not for vanderwaal gas. Charles' gas law is used here. Therefore the new volume of the balloon in the hot room is 3.68 L.

What is ideal gas equation?

Ideal gas equation is the mathematical expression that relates pressure volume and temperature. Vanderwaal gas can behave as ideal gas low pressure and high temperature.

Mathematically the relation between Pressure, volume and temperature can be given as

PV=nRT

where,

P = pressure of gas

V= volume of gas

n =number of moles of gas

T =temperature of gas

R = Gas constant = 0.0821 L.atm/K.mol

Combining Boyle's and Charles' gas law

V₁/T₁ = V₂/T₂

3.50 L ÷298 K = V₂÷313 K

V₂ = 3.68 L

Therefore the new volume of the balloon in the hot room is 3.68 L.

To learn more about ideal gas equation, here:

brainly.com/question/14826347

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yes, according to charles law, this would be equal to 3.68 L

Water can dissolve other substances. Which factor best contributes to this property of water?A. Water is made up of ionic bonds.
B. Water has weak intermolecular forces.
C. Water is denser than most substances.
D. Water particles are not fixed in place.

Answers

Water is known to be theuniversal solvent because it can mostly dissolve most of the substances. Thereason behind its solvability is the bonding of intermolecular forces of attraction.The answer is letter B. Out of the many bondings between molecules, the bondthat governs water is H bonding or hydrogen bonding. Water is composed mostlyof two atoms of hydrogen one atom of oxygen. Both the hydrogen and oxygen arepolar elements and hydrogen is bounded with a high electronegativity oxygen atom.

The correct answer for e2020 is D

If i add water to 100 mL of a 0.15M NaOH solution until the final volume 150mL , what will the molarity of the diluted solution be ?

Answers

If water is added to 100 ml of a 0.15 M NaOH solution until the final volume of 150 ml. The molarity of the diluted solution is 0.1 mol. L.

What is molarity?

Molarity is the measure of the concentration of any solute per unit volume of the solution.

$Molarity = (mole\; of \;solute)/(volume \;of \; solution) \n$

Moles of solute is $0.15 mol. L^-^1 * 100 * 10^-^3 \;L$

Volume is 150 ml

Putting the value

$Molarity = (0.15 mol. L^-^1 * 100 * 10^-^3 \;L)/(150\; ml) =0.1 mol * L$

Thus, the molarity of the diluted solution is 0.1 mol. L.

Learn more about molarity

brainly.com/question/12127540

0,15 moles of NaOH-------in------------1000ml
x moles of NaOH------------in--------100ml
x = 0,015 moles of NaOH

final volume = 150ml

0,015 moles of NaOH---in-------150ml
x moles of NaOH--------------in-----1000ml
x = 0,1 moles of NaOH

answer: 0,1mol/dm³ (molarity)

A rigid tank contains 1.40 moles of an ideal gas. Determine the number of moles of gas that must be withdrawn from the tank to lower the pressure of the gas from 24.5 atm to 5.30 atm. Assume the volume of the tank and the temperature of the gas remain constant during this operation.

Answers

Answer : The final number of moles of gas that withdrawn from the tank to lower the pressure of the gas must be, 0.301 mol.

Explanation :

As we know that:

$PV=nRT$

At constant volume and temperature of gas, the pressure will be directly proportional to the number of moles of gas.

The relation between pressure and number of moles of gas will be:

$(P_1)/(P_2)=(n_1)/(n_2)$

where,

$P_1$ = initial pressure of gas = 24.5 atm

$P_2$ = final pressure of gas = 5.30 atm

$n_1$ = initial number of moles of gas = 1.40 moles

$n_2$ = final number of moles of gas = ?

Now put all the given values in the above expression, we get:

$(24.5atm)/(5.30atm)=(1.40mol)/(n_2)$

$n_2=0.301mol$

Therefore, the final number of moles of gas that withdrawn from the tank to lower the pressure of the gas must be, 0.301 mol.

Give the significant figures of 0.011cm

Answers

Answer:

0.011 has 2 significant figures

Explanation:

The part of a cell that gives the cell unique characteristics is theA) nucleus.
B) vacuole.
C) cytoplasm.
D) membrane.

Answers

A) Nucleus

The nucleus of a biological cell contains the genetic information that is used to create the proteins within the cell, and, in the case of multicellular organisms, proteins outside of the cell as well. This is why the nucleus contains the "identity" of the cell since it has all of the information required to create the cell. Therefore, the nucleus provides the unique characteristics.

Answer:

A) nucleus

Explanation:

The nucleus of a cell contains chromosomes, which contain DNA. This gives a cell unique characteristics.

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