Chemistry: Mole Concept & Molar Mass

True (A)

5

<p>g/L</p> Signup and view all the answers

<p>22.4 L of O2 = 1 mole 44.8 L of CO2 = 2 moles 112 L of Cl2 = 5 moles 11.2 L of H2 = 0.5 mole</p> Signup and view all the answers

<p>44.8 L (B)</p> Signup and view all the answers

<p>22.4 L</p> Signup and view all the answers

<p>True (A)</p> Signup and view all the answers

<p>33.6 L (A)</p> Signup and view all the answers

<p>True (A)</p> Signup and view all the answers

<p>44 g/mol</p> Signup and view all the answers

<p>volume</p> Signup and view all the answers

<p>He = 4 g/mol O2 = 32 g/mol CO2 = 44 g/mol SO3 = 80 g/mol</p> Signup and view all the answers

<p>0.05 mol (B)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>6.02 x 10^23</p> Signup and view all the answers

<p>molecules</p> Signup and view all the answers

<p>Oxygen = O2 Hydrogen = H2 Sulfur Dioxide = SO2 Carbon Dioxide = CO2</p> Signup and view all the answers

<p>8.428 x 10^24 (C)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>1.204 x 10^25</p> Signup and view all the answers

At standard temperature and pressure (STP), 1 mole of any ideal gas occupies a volume of 22.4 liters.

Standard Temperature and Pressure, a set of standard conditions for comparing gases. It's 0°C and 1 atm pressure.

The volume of a gas sample is directly proportional to the number of moles of gas present, assuming constant temperature and pressure.

The volume of a specific amount of gas (in moles) can be found if the volume of 1 mole of gas is known at standard conditions.

The mass of a substance is directly proportional to the number of moles of the substance present.

At standard temperature and pressure (STP), 1 mole of any gas occupies 22.4 liters.

The number of moles (n) of a gas at STP can be found using the formula: n = V / 22.4, where V is the volume in liters.

5 moles of chlorine gas (Cl2) at STP occupy 112 liters.

2 moles of oxygen gas (O2) occupy 44.8 liters at STP.

The density of a gas at STP is usually given in grams per liter (g/L).

Each molecule has a specific number of atoms. Multiply the number of moles by Avogadro's number and then by the number of atoms per molecule.

The mass of one mole of a substance. Units are typically grams per mole (g/mol).

To find the number of moles of a substance, divide the number of particles (atoms, molecules, ions) by Avogadro's number (6.02 x 10^23).

The number of particles (atoms, molecules, ions) in one mole of a substance.

A mole represents a specific number of particles of a substance. It's a unit of measurement in chemistry.

Divide the number of helium atoms by Avogadro's number to get the number of moles. (0.05)

One H₂SO₄ molecule contains 7 atoms (2 hydrogen, 1 sulfur, 4 oxygen).

Firstly, find the number of H₂SO₄ molecules in 2 moles. Then multiply by the number of atoms per molecule.

A mole of a substance contains Avogadro's number of that substance's atoms, ions, or molecules

Multiply the number of moles by Avogadro's number to find the number of oxygen molecules.