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  5. Chapter 8a Quiz : Percent Yield, Empirical Formula

Chapter 8a Quiz : Percent yield, Empirical Formula

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Science

9th - 12th Grade

NGSS covered

Used 3+ times

Chapter 8a Quiz : Percent yield, Empirical Formula
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7 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the formula for percent yield?

ActualTheoretical×100\frac{Actual}{Theoretical}\times100

TheoreticalActual×100\frac{Theoretical}{Actual}\times100

Actual×Theoretical100\frac{Actual\times Theoretical}{100}

100Actual×Theoretical\frac{100}{Actual\times Theoretical}

Tags

NGSS.HS-PS1-7

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following reactions has the lowest percent yield?

Theoretical yield 25.7 g; actual yield 23.2 g

Theoretical yield 42.1 g; actual yield 39.9 g

Theoretical yield 18.2 g; actual yield 15.6 g

Theoretical yield 93.4 g; actual yield 87.9 g

Tags

NGSS.HS-PS1-7

3.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

2Fe2O3 + C → Fe + 3CO2

Ezra adds 28 grams of carbon. He finds the actual yield to be 181.2 grams of CO2. What is the percent yield of CO2? (Hint: calculate theoretical yield of CO2 first)

58.83%

308.0%

64.35%

15.50%

Tags

NGSS.HS-PS1-7

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the empirical formula for P2O6?

P2O6

PO

PO3

P3O

Tags

NGSS.MS-PS1-1

5.

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

What is the molecular formula for a compound with the empirical formula: K2SO4 and a molecular mass of 696g.

K2SO4

K8SO16

K8S4O8

K8S4O16

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

A chemical formula that shows the actual # and kinds of atoms present in one molecule of a compound is called_________

ionic formula
covalent formula
empirical formula
molecular formula

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following could be a molecular formula with the empirical formula of CH2O?

CH2O2

CHO

C3H5O3

C2H4O2

Tags

NGSS.MS-PS1-1

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