Practice Quiz #6 Ch.17-18-19 2025 Spring

What is the chemical formula for aluminum chloride?

• AlCl

• AlCl₂

• Al₂Cl₃

• AlCl₃

Which of the following is a diatomic molecule?

• CO₂

• H₂

• CH₄

• NH₄⁺¹

Tags

NGSS.MS-PS1-1

Calculate the molar mass of water (H₂O).

• 16.00 g/mol

• 18.02 g/mol

• 20.04 g/mol

• 22.00 g/mol

How many moles are in 50 grams of NaCl? (Molar mass of NaCl = 58.44 g/mol)

• 0.86 moles

• 1.14 moles

• 0.50 moles

• 1.00 moles

Tags

NGSS.HS-PS1-7

What is the empirical formula of a compound that is 40% sulfur and 60% oxygen by mass?

• SO

• SO₃

• S₂O

• S₂O₃

Determine the molecular formula of a compound with an empirical formula of CH₂ and a molar mass of 56 g/mol.

• C₂H₄

• C₃H₆

• C₄H₈

• C₅H₁₀

What is the name of the compound with the formula HCl?

• Hydrochloric acid

• Chloric acid

• Hypochlorous acid

• Perchloric acid

Tags

NGSS.HS-PS1-1

Calculate the number of molecules in 2 moles of CO₂.

What is the formula for the compound formed between aluminum and oxygen?

• AlO

• Al₂O₃

• AlO₂

• Al₃O₂

Tags

NGSS.HS-PS1-2

If you have 0.5 moles of H₂O, how many grams do you have?

• 9.01 grams

• 18.02 grams

• 27.04 grams

• 36.04 grams