Stochiometry

Stochiometry

11th Grade

10 Qs

quiz-placeholder

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Stochiometry

Stochiometry

Assessment

Quiz

Chemistry, English

11th Grade

Practice Problem

Hard

NGSS
HS-PS1-7

Standards-aligned

Created by

Tóth Edina

Used 404+ times

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10 questions

Show all answers

1.

MULTIPLE SELECT QUESTION

30 sec • 1 pt

___NH3 + ___O2 → ___NO2 + ___H2O

The balanced equation shows that 1.00 mole of NH3 requires ___ mole(s) of O2

0.57

1.25

1.33

1.75

2.

MULTIPLE SELECT QUESTION

45 sec • 1 pt

Write a balanced equation for the combustion of acetaldehyde. The equation indicates that ___ mole(s) of O2 are required for each mole of it.

1

2

2.5

3

5

3.

MULTIPLE SELECT QUESTION

45 sec • 1 pt

What is the total mass of products formed when 16 grams of CH4 is burned with excess oxygen?

32 g

36 g

44 g

62 g

80 g

4.

MULTIPLE SELECT QUESTION

45 sec • 1 pt

Balance the following equation with the SMALLEST WHOLE NUMBER COEFFICIENTS possible. Select the number that is the sum of the coefficients in the balanced equation: ___KClO3 → ___KCl + ___O2

3

5

6

7

8

5.

MULTIPLE SELECT QUESTION

45 sec • 1 pt

Calculate the mass of hydrogen formed when 27 g of aluminum reacts with excess hydrochloric acid according to the balanced equation below. 2Al + 6HCl → 2 AlCl3 + 3 H2

1.5 g

2.0 g

3.0 g

6.0 g

12 g

Tags

NGSS.HS-PS1-7

6.

MULTIPLE SELECT QUESTION

45 sec • 1 pt

How many grams of nitric acid, HNO3, can be prepared from the reaction of 138 g of NO2 with 54.0 g H2O according to the equation below?

3NO2 + H2O → 2HNO3 + NO

92

108

126

189

279

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following statements is true?

I. The molar mass of CaCO3 is 100.1 g mol−1.

II. 50 g of CaCO3 contains 9 ×1023 oxygen atoms.

III. A 200 g sample of CaCO3 contains 2 moles of CaCO3

None of them

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