Stoichiometry

Question 1

What is the molar mass of CO2

Answer 1

44.01g

Question 2

2H2 + 1O2 -> 2H2O
Using this BALANCED equation, if I have 7 moles of oxygen how many moles of Hydrogen will be needed to use up all the oxygen and make water?

Answer 2

14.00 moles of Hydrogen

Question 3

2H2 + 1O2 -> 2H2O

Using this BALANCED equation, if I have 205.30 moles of water how many moles of oxygen would I need?

Answer 3

102.65moles of Oxygen

Question 4

How many decimal places do you write the answers in?

Answer 4

2 DECIMAL PLACES ALWAYS

Question 5

2H2 + 1O2 -> 2H2O

Using this BALANCED equation, if I have 0.40moles of hydrogen, how many moles of water can I make?

Answer 5

0.40 moles of water

Question 6

2H2 + 1O2 -> 2H2O

Using this BALANCED equation, if we have 0.52g of hydrogen how many GRAMS of oxygen will we need to make water?

Answer 6

we need 4.12g of oxygen to make water

Question 7

2H2 + 1O2 -> 2H2O

Using this BALANCED equation, if you have 1.00g of hydrogen how much water can you make?

Answer 7

0.50moles of water

Question 8

2H2 + 1O2 -> 2H2O
Using this BALANCED equation, if you have 1.00g of hydrogen how much oxygen will you need to make as much water as possible?

Answer 8

0.25moles of oxygen

Question 9

Balance this equation:

__(Fe2)(O3) + __Al–> __(Al2)(O3) + __Fe

Answer 9

1(Fe2)(O3) + 2(Al) –> 1 (Al2)(O3)+ 2(Fe)

Question 10

(Mg) + 2(HCl) –> (MgCl2) + (H2)

If you have 24.3 g of Mg, how many grams of H2 will you produce?

Answer 10

2.02g of hydrogen

Question 11

2(Na) + (Cl2) –> 2 (NaCl)

If you want to produce 54 g of (NaCl), how many grams of (Cl2) do you need?

Answer 11

33.00 grams of (Cl2)

Question 12

(Mg) + 2(HCl) –> (MgCl2) + (H2)

If you have 0.94 moles of HCl, how many grams of Mg do you need?

Answer 12

11.00g of Mg

Question 13

2 (Na) + (Cl2) –> 2 (NaCl)

If you have 141.8 g of (Cl2), how many moles of Na do you need?

Answer 13

4.00moles of Na

Question 14

2 (Na) + (Cl2) –> 2 (NaCl)

If you have 4.0 moles of (Cl2), how many grams of Na do you need?

Answer 14

180.00g of Na

Question 15

Mg + 2(HCl) –> (MgCl2) + (H2)

If you have 42.1 g of HCl, how many moles of H2 will you produce?

Answer 15

0.58moles of hydrogen

Question 16

Mg + 2(HCl) –> (MgCl2) + (H2)

If you have 66.6 moles of HCl, how many moles of Mg will you require?

Answer 16

33.30moles of Mg

Question 17

2 (Na) + (Cl2) –> 2 (NaCl)

If you have 313.2 moles of NaCl, how many moles of Na did you begin with?

Answer 17

313.20moles of Na

Question 18

Mg + 2(HCl) –> (MgCl2) + (H2)

If you have 2.0 moles of Mg, how many moles of (MgCl2) will you make?

Answer 18

2.00moles of (MgCl2)

Question 19

2 (Na) + (Cl2) –> 2 (NaCl)

If you have 3.2 moles of Na, how many moles of (Cl2) do you need?

Answer 19

1.6moles of (Cl2)

Question 20

What is the molar mass of (Fe2)(O3)?

Answer 20

159.70g

Question 21

What is the molar mass of 2(Al) ?

Answer 21

53.96g

Question 22

What is the molar mass of (Fe2)(O3)+ 2(Al) ?

Answer 22

213.66g

Question 23

What is the molar mass of 2(H2O) ?

Answer 23

36.04g

Question 24

How many moles are in CO2?

Answer 24

1 mole

Question 25

How many moles are in 2(Fe2O3) ?

Answer 25

2 moles