CHEM II Mass, Moles, Atoms Conversions

How many moles are in 36.04 grams of water (H₂O)?

• 2.000 mol H₂O

• 1.000 mol H₂O

• 0.500 mol H₂O

• 18.02 mol H₂O

Calculate the number of moles in 100.0 grams of potassium chloride (KCl).

• 1.341 mol KCl

• 0.500 mol KCl

• 2.000 mol KCl

• 0.750 mol KCl

How many moles of iron (Fe) are in a 223.4-gram sample?

• 4.000 mol Fe

• 2.000 mol Fe

• 1.500 mol Fe

• 6.022 mol Fe

What is the mass in grams of 2.50 moles of oxygen gas (O₂)?

• 80.0 g O₂

• 16.0 g O₂

• 32.0 g O₂

• 40.0 g O₂

Calculate the mass of 0.85 moles of ammonia (NH₃).

• 14 g NH₃

• 10 g NH₃

• 17 g NH₃

• 7 g NH₃

What is the mass in grams of 4.20 moles of iron(III) oxide (Fe₂O₃)?

• 671 g Fe₂O₃

• 320 g Fe₂O₃

• 420 g Fe₂O₃

• 840 g Fe₂O₃

Tags

NGSS.HS-PS1-7

How many molecules are in 3.0 moles of carbon dioxide (CO₂)?

• 1.8 × 10²⁴ molecules CO₂

• 6.0 × 10²³ molecules CO₂

• 9.0 × 10²⁴ molecules CO₂

• 3.0 × 10²³ molecules CO₂

Calculate the number of atoms in 1.50 moles of pure iron (Fe).

• 9.03 × 10²³ atoms Fe

• 6.02 × 10²³ atoms Fe

• 1.50 × 10²⁴ atoms Fe

• 3.01 × 10²³ atoms Fe

How many molecules are in 0.40 moles of butane (C₄H₁₀)?

• 2.4 × 10²³ molecules C₄H₁₀

• 6.0 × 10²² molecules C₄H₁₀

• 1.2 × 10²⁴ molecules C₄H₁₀

• 3.0 × 10²³ molecules C₄H₁₀

• 2.000 mol H2O

• 0.500 mol H2O

• 1.000 mol H2O

• 0.200 mol H2O