Stoichiometry

Stoichiometry

Assessment

Flashcard

Chemistry

10th - 12th Grade

Practice Problem

Hard

Created by

Wayground Content

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15 questions

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1.

FLASHCARD QUESTION

Front

If 3.29 x 1023 atoms of potassium react with excess water, how many liters of hydrogen gas would be produced at STP?
2 K + 2 H2O -->  2 KOH + H2

Back

6L

2.

FLASHCARD QUESTION

Front

How many molecules are in 1 mole of CO2?

Back

6.02 x 10 23 molecules

3.

FLASHCARD QUESTION

Front

What is the first step in stoichiometry? Options: Determine a balanced equation, convert grams to moles, convert grams to liters, use the mole ratio

Back

Determine a balanced equation

4.

FLASHCARD QUESTION

Front

N2 +  3H2 → 2NH3
What is the mole ratio between Nitrogen and Ammonia in the above reaction?

Back

2 moles NH3 / 1 moles N2

5.

FLASHCARD QUESTION

Front

In the formation of CO2 from CO and oxygen, how many Liters of CO2 are produced by the reaction of 8 mols of O2 with an excess of carbon monoxide?

Back

358.4 Liters

6.

FLASHCARD QUESTION

Front

B2H6 + 3O2 --> 2 HBO2 + 2 H2O
What mass of O2 will be needed to burn 36.1 g of B2H6? Options: 13.8 g O2, 3.86 mol of O2, 124 g O2

Back

124 g O2

7.

FLASHCARD QUESTION

Front

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

Back

3 mol MgO / 2 mol Fe

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