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*** no longer use *** Reaction Math Practice

Authored by Hannah Pollard

Chemistry

12th Grade

Used 2+ times

*** no longer use *** Reaction Math Practice
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10 questions

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1.

MULTIPLE CHOICE QUESTION

10 mins • 5 pts

What is the mole ratio of H2O to H3PO4 in the following chemical equation?  

P4O10 + H2O -->H3PO

Don't forget to balance the equation!

6:4
4:6
1:3
3:1

2.

MULTIPLE CHOICE QUESTION

10 mins • 5 pts

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

0.85 g
290 g
450 g
870 g

3.

MULTIPLE CHOICE QUESTION

10 mins • 5 pts

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

Don't forget to balance the reaction!

4 moles Fe
6 moles Fe
9 moles Fe
2 moles Fe

4.

MULTIPLE CHOICE QUESTION

10 mins • 5 pts

18.26 mL of a 1.50 M hydrochloric acid reacts with magnesium hydroxide. Calculate the mass of magnesium hydroxide needed for the reaction.

Mg(OH)2 + 2 HCl -> 2 H2O + MgCl2

0.499 g Mg(OH)2

0.799 g Mg(OH)2

0.0274 Mg(OH)2

0.0137 g Mg(OH)2

5.

MULTIPLE CHOICE QUESTION

10 mins • 5 pts

When 12 moles of O2 reacts with 1.1 mole of C10H8 what is the limiting reactant?  C10H8 + 12 O2 --> 10 CO2 + 4 H2O

Oxygen
C10H8
Water
Carbon Dioxide

6.

MULTIPLE CHOICE QUESTION

10 mins • 5 pts

What is the percent yield of the following reaction if 145g of P2Oreacts with 40 grams of water, but you only collected 112 grams of phosphoric acid  

3 H2O + P2O5 -> 2H3PO4

80%
85%
77%
58%

7.

MULTIPLE CHOICE QUESTION

10 mins • 5 pts

Nitric acid can be neutralized by any base to form a salt and water, as in the following equation:

Mg(OH)2 + 2 HNO3 → Mg(NO3)2 + 2 H­2O

How much of the excess reactant remains when the reaction of 250. g magnesium hydroxide with 250. g nitric acid is complete?

44 g

384 g

116 g

134 g

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