UNIT 7: MOLE CONCEPT TEST REVIEW

How many grams of K₂S are present in 11 moles?

• 10.02 grams

• 1,212.86 grams

• .09 grams

• 110.26 grams

Calculate the number of molecules present in 0.20 moles NaCl.

• 1.20 x 10²³ molecules

• 3.01 x 10²³ molecules

• 3.32 x 10²⁵ molecules

• 6.02 x 10²³ molecules

A sample contains 3.01 x 10²³ atoms of K, how many grams would this be?

• 1.8 x 10⁴⁷ grams

• .5 grams

• 19.6 grams

• 2 grams

How many moles are there in 2.408 x 10²⁴ atoms of Br?

• 4 moles

• .25 moles

• 1.5 moles

• 57 moles

How many moles are in 48 grams of Cl?

• 1,701.6 moles

• 1.35 moles

• .74 moles

• 35.45 moles

How many molecules are present 2.5 grams of V₂O₅?

• .013 molecules

• 8.27 x 10²¹ molecules

• 7.55 x 10²² molecules

• 181.88 molecules

How many moles are present 20 grams of methane, CH₄?

• 1.25 moles

• .80 moles

• 1.2 x 10²⁵ moles

• 3.32 x 10²³ moles

How many molecules are present 3.5 moles of CO₂?

• 2.11 x 10²⁴ molecules

• 5.81 x 10²⁴ molecules

• .08 molecules

• 12.57 molecules

Convert .73 moles of H₂O to grams.

• 13.15 grams

• 24.68 grams

• 1.21 x 10²⁴ grams

• 8.25 x 10²³ grams

Calculate the number of moles in 8.22 x 10²⁴ particles of O₂.

• 13.65 moles

• .07 moles

• 2.57 x 10²³ moles

• 3.89 x 10²⁴ moles