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Test on Stoichiometry ( 1)

Authored by PRACHI SALVI

Chemistry

11th Grade

Used 9+ times

Test on Stoichiometry ( 1)
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15 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

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

Write a Balanced Equation
Panic
Write an Unbalanced Equation
Ask for help

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

KNO3 --> KNO2 + O2
What coefficients are needed to balance the reaction?

2, 2, 1
2, 3, 2
1, 2, 2
1, 3, 1

3.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

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

4 moles
8 moles
16 moles
2 moles

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is a Limiting Reagent?

speeds up a reaction
what you run out of first
what you have left over
slows down a reaction

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

You need 2 pieces of bread, 1 tablespoon of peanut butter and 2 tablespoons of jelly to make a sandwich.  If you have 10 pieces of bread, 4 tablespoons of peanut butter and 20 tablespoons of jelly, what is the limiting reactant?

bread
jelly
peanut butter
sandwich

6.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

For the Balanced Reaction: 3 Mg + 1 Fe2O3 → 3 MgO + 2 Fe; What is the Ratio of moles of MgO to moles Fe?

3mol Mg / 2 mol Fe
2 mol Mg/ 3 mol Fe
1 mol Fe/ 2 mol Fe
3 mol MgO / 2 mol Fe

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

If you predicted that 1.5 moles of Magnesium are used in a reaction, and you have 1.0 mole of Magnesium, how much Magnesium is in Excess?

0.5 moles Mg
1.5 moles Mg
1.0 mole Mg
0.0 Moles Mg

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