Mole to Mole Conversions

How many moles of sodium chloride are in a 321.8 g sample?

• 18810 moles

• 3.315 x 10²⁴ moles

• 5.507 moles

• 4.767 moles

Use the given the chemical equation to answer the following question: 2C₂H₆ + O₂ → 4CO₂ + 6H₂O What does the number 4 represent for the formula unit 4CO2 ?

• The number 4 represents the coefficient, which is also equal to the number of grams of the formula unit above.

• The number 4 represents the subscript, which is also equal to the number of moles of the formula unit above.

• The number 4 represents the coefficient, which is also equal to the number of moles of the formula unit above.

• The number 4 represents the subscript, which is also equal to the number of grams of the formula unit above.

How many molecules are in 2.5 mol of NaCl?

• 1.50 x10²⁴ molecules

• 1.50 molecules

• 4.15 molecules

• 1.51 x10²⁴ molecules

How many moles are in 19.82 g Mg?

• 1.23 mol Mg

• 481.70 mol Mg

• 1.00 mol Mg

• 0.82 mol Mg

What mass of calcium chlorate, Ca(ClO₃)₂, is equivalent to 0.750 moles of the substance?

• 155.24 grams

• 206.98 grams

• 128.65 grams

How many moles of hydrogen gas are produced from 5 moles of water in the reaction: @@ ext{2H}_2 ext{O} ightarrow ext{2H}_2 + ext{O}_2@@?

• 2.5 moles

• 5 moles

• 10 moles

• 1 mole

Tags

NGSS.HS-PS1-7

In the reaction @@ ext{N}_2 + 3 ext{H}_2 ightarrow 2 ext{NH}_3@@, how many moles of ammonia are produced from 6 moles of hydrogen gas?

• 2 moles

• 4 moles

• 6 moles

• 12 moles

If 4 moles of carbon dioxide are produced, how many moles of oxygen gas were used in the reaction: @@ ext{C} + ext{O}_2 ightarrow ext{CO}_2@@?

• 2 moles

• 4 moles

• 8 moles

• 1 mole

Tags

NGSS.HS-PS1-7

How many moles of water are needed to produce 3 moles of oxygen gas in the reaction: @@2 ext{H}_2 ext{O} ightarrow 2 ext{H}_2 + ext{O}_2@@?

• 3 moles

• 6 moles

• 1.5 moles

• 2 moles

In the reaction @@ ext{2KClO}_3 ightarrow 2 ext{KCl} + 3 ext{O}_2@@, how many moles of potassium chloride are produced from 5 moles of potassium chlorate?

• 5 moles

• 10 moles

• 7.5 moles

• 2.5 moles

Tags

NGSS.HS-PS1-7