Chapter 10 Review: The Mole

What SI unit is used to measure the number of representative particles in a substance?

• ampere
• cubic meter
• kilogram
• Mole

Tags

NGSS.HS-PS1-7

Avagadro’s number of representative particles is equal to one ____.

• gram
• mole
• kilogram
• Kelvin

The volume of one mole of a substance is 22.4 L at STP for all ____.

• gases
• atoms
• liquids
• Solids

The lowest-whole number ratio of the elements in a compound is called the

• representative formula
• binary formula
• empirical formula
• molecular formula

If the density of an unknown gas, Z, is 1.11 g/L at STP, what is the molar mass of gas Z?

• 5.00 g/mol
• 56.0 g/mol
• 0.112 g/mol
• 24.9 g/mol

If 40.0 grams of Ca combines completely with 25.0 grams of S to form a compound, what is the percent composition of Ca in the compound?

• 61.5 %
• 38.5 %
• 1.6 %
• 40.0 %

Tags

NGSS.HS-PS1-7

What is the number of moles in 250 L of H₂ gas at STP?

• 0.2 mol
• 22.4 mol

• 11 mol
• 0.05 mol

How many moles of silver atoms are in 1.02 x 10²⁴ formula units of AgCl?

• 1.7 moles

• 3.0 moles

• 0.025 moles

• 0.64 moles

• A
• B
• C
• D

• A
• B
• C
• D