2/19 Practice Quizizz ANSWERS

Balance the following reaction: CaC₂(s) + H₂O(l) --> C₂H₂(g) + Ca(OH)₂(aq)

1,2,1,1

A student burns 1.50 mol C3H8 according to the following reaction: C3H8 + 5O2 → 3CO2 + 4H2O How many grams of carbon dioxide are produced?

198 g

Cl2 + 2KBr → Br2 + 2KCl How many grams of potassium chloride (KCl) can be produced from 356 g of potassium bromide (KBr)?

223 g

For the reaction represented by the equation Cl2 + 2KBr → Br2 + 2KCl, how many grams of potassium chloride can be produced from 356 grams potassium bromide?

225 g

1 Body + 4 Tires --> 1 car How many cars can you make with 92 tires and 34 bodies?

23

2Al + 3H2SO4 -> Al2(SO4)3 + 3H2 How many grams of aluminum sulfate would be formed if 250g H2SO4 completely reacted with aluminum?

290 g

The Formula to make S'mores is: 2C + 1M + G2 → C2MG2. If you have 5 Marshmallows (M), 9 Chocolate Pieces (C), and 9 Graham Cracker Halves (G), how many S'mores can you make?

4

Using the following equation: Fe2O3(s) + 3H2(g) → 2Fe(s) + 3H2O(l) How many moles of iron can be made from 6 moles H2?

4 moles Fe

2NaClO3 (s) → 2NaCl (s) + 3O2 (g) 12.00 moles of NaClO3 will produce how many grams of O2?

576 g of O2

What is the mole ratio of H2O to H3PO4 in the following chemical equation? P4O10 + 6 H2O --> 4 H3PO4

6:4

SO2 + PCl5 --> SOCl2 + POCl3 How much SOCl2 is produced when 16.2g SO2 react with 13.7g PCl5?

7.87g

2H2 + O2 → 2H2O How many moles of water can be produced if 8 moles H2 are used?

8 moles

Use the equation 2 Al + 3 Cl2 ---> 2 AlCl3. If 2 moles of aluminum and 2 moles of chlorine are reacted, identify the limiting reactant.

Cl2

Fe + S --> FeS If 7.62g Fe react with 8.67g S, what is the limiting reactant?

Fe

CH4 + 2H2O --> CO2 + 4H2 What is the limiting reactant when 20g CH4 react with 15g H2O?

H2O

What is the first thing you must do to solve a stoichiometry problem?

Write a Balanced Equation

A reactant that remains after a chemical reaction stops

excess reactant

The limiting reactant

is used up first

A reactant that is totally consumed during a chemical reaction, limits the extent of the reaction, and determines the amount of product

limiting reactant

When the limiting reactant is used up, what happens?

the reaction stops