Chemistry Answers

Louisa wants to fill a large balloon with the carbon dioxide that is produced by this reaction.

What mass of hydrochloric acid will she have to use in order to produce a volume of 100. L of

CO2 at STP?

Tina adds 217 g of iron(III) carbonate to a beaker containing HCI. Calculate the mass of iron (II)

chloride and the mass of water that are produced in the reaction.

2 Al + 3 CuCh2 -› 2 AICl, + 3 Cu

Molar masses: 27.0 g/mol Al,

134.5 g/mol CuCh2, 63.5 g/ mol

Cu

Question 1: How many grams of CuCh2 are

necessary to consume 10 g Al?

Question 2: How many grams of Cu will be

produced?

A chemist performed this reaction and

obtained 45.5 g BaSO4. How much HCI

was also produced?

Molar masses: 233.4 g/mol BaSOA,l4

36.5 %mol HCI

A. 9.49 g HCI

C. 5.35 g HCI

B. 388 g HCI

D. 7.12 g HCI

2.50 moles of BaCh4 are reacted. How

many moles of BaSO4 are produced?

A. 2.50 mol BaSO4

B. 3.75 mol BaSO4

C. 1.67 mol BaSO4

D. 5.00 mol BaSO4

3. If 17.3 g SO2 are reacted, how much O2

is consumed?

Molar masses: 32.0 g/mol O2, 64.0 g/molSO2

A. 17.3 g O2

B. 0.135 g O2

C. 0.270 g O2

D. 4.33 g O2

10.3 moles of H2O are produced. How

many moles of Fe are also produced?

A. 15.5 mol Fe

B. 6.87 mol

C. 5.2 mol Fe

D. 20.6 mol Fe

25.0 g H2 are reacted, how much Fe is

produced?

Molar masses: 2.02 g/mol H2, 55.9 g/mol Fe

A. 0.903 g Fe

B. 1,112 g Fe

C. 692 g Fe

D. 346 g Fe

If 0.425 mol H2O are produced, how

many moles of CO3 were reacted?

A. 0.425 mol CO3

B. 0.850 mol CO3

C. 0.213 mol CO3

D. 0.626 mol CO3

If 1.20 g CO3 are reacted, how much NH3

will be produced?

Molar masses:

60.0 g/mol CO3, 17.0 g/ mol NH3

A. 0.17 g CO3

B. 0.68 g CO3

C. 8.47 g CO3

D. 2.12 g CO3