Number, NAPX-F4-CA26

Question

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Worked Solution

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Variant 0

DifficultyLevel

688

Question

A red blood cell and a white blood cell have a combined total mass of 4.2×10−114.2 × 10^{−11} grams.

If the red blood cell has a mass of 2×10−122 × 10^{−12} grams, what is the mass of the white blood cell?

Worked Solution

4.2×10−11 − 2×10−124.2 × 10^{−11}\ −\ 2 × 10^{−12}

= 4×10−114 × 10^{−11} grams

Question Type

Multiple Choice (One Answer)

Variables

Variable nameVariable value
question
A red blood cell and a white blood cell have a combined total mass of $4.2 × 10^{−11}$ grams. If the red blood cell has a mass of $2 × 10^{−12}$ grams, what is the mass of the white blood cell?
workedSolution
$4.2 × 10^{−11}\ −\ 2 × 10^{−12}$ >> = {{{correctAnswer}}}
correctAnswer
$4 × 10^{−11}$ grams

Answers

Is Correct?Answer
✓

4×10−114 × 10^{−11} grams

x

4×10−124 × 10^{−12} grams

x

2.2×10−112.2 × 10^{−11} grams

x

2.2×10−122.2 × 10^{−12} grams

Variant 1

DifficultyLevel

693

Question

A red blood cell and a white blood cell have a combined total mass of 5.3×10−95.3 × 10^{−9} grams.

If the red blood cell has a mass of 3×10−103 × 10^{−10} grams, what is the mass of the white blood cell?

Worked Solution

5.3×10−9 − 3×10−105.3 × 10^{−9}\ −\ 3 × 10^{−10}

= 5×10−95 × 10^{−9} grams

Question Type

Multiple Choice (One Answer)

Variables

Variable nameVariable value
question
A red blood cell and a white blood cell have a combined total mass of $5.3 × 10^{−9}$ grams. If the red blood cell has a mass of $3 × 10^{−10}$ grams, what is the mass of the white blood cell?
workedSolution
$5.3 × 10^{−9}\ −\ 3 × 10^{−10}$ >> = {{{correctAnswer}}}
correctAnswer
$5 × 10^{−9}$ grams

Answers

Is Correct?Answer
x

5×10−105 × 10^{−10} grams

✓

5×10−95 × 10^{−9} grams

x

2.3×10−102.3 × 10^{−10} grams

x

2.3×10−92.3 × 10^{−9} grams

Variant 2

DifficultyLevel

678

Question

Two mico-organisms have a combined total mass of 6.4×10−116.4 × 10^{−11} grams.

If one of the mico-organisms has a mass of 4×10−124 × 10^{−12} grams, what is the mass of the other micro-organism?

Worked Solution

6.4×10−11 − 4×10−126.4 × 10^{−11}\ −\ 4 × 10^{−12}

= 6×10−116 × 10^{−11} grams

Question Type

Multiple Choice (One Answer)

Variables

Variable nameVariable value
question
Two mico-organisms have a combined total mass of $6.4 × 10^{−11}$ grams. If one of the mico-organisms has a mass of $4 × 10^{−12}$ grams, what is the mass of the other micro-organism?
workedSolution
$6.4 × 10^{−11}\ −\ 4 × 10^{−12}$ >> = {{{correctAnswer}}}
correctAnswer
$6 × 10^{−11}$ grams

Answers

Is Correct?Answer
x

6×10−106 × 10^{−10} grams

✓

6×10−116 × 10^{−11} grams

x

2.4×10−102.4 × 10^{−10} grams

x

2.4×10−112.4 × 10^{−11} grams

Variant 3

DifficultyLevel

674

Question

In a single grain of salt, sodium and chlorine have a combined total mass of 3.8×10−123.8 × 10^{−12} grams.

If the sodium has a mass of 8×10−138 × 10^{−13} grams, what is the mass of the chlorine?

Worked Solution

3.8×10−12 − 8×10−133.8 × 10^{−12}\ −\ 8 × 10^{−13}

= 3×10−123 × 10^{−12} grams

Question Type

Multiple Choice (One Answer)

Variables

Variable nameVariable value
question
In a single grain of salt, sodium and chlorine have a combined total mass of $3.8 × 10^{−12}$ grams. If the sodium has a mass of $8 × 10^{−13}$ grams, what is the mass of the chlorine?
workedSolution
$3.8 × 10^{−12}\ −\ 8 × 10^{−13}$ >> = {{{correctAnswer}}}
correctAnswer
$3 × 10^{−12}$ grams

Answers

Is Correct?Answer
x

4.2×10−124.2 × 10^{−12} grams

x

4.2×10−134.2 × 10^{−13} grams

✓

3×10−123 × 10^{−12} grams

x

3×10−133 × 10^{−13} grams

Variant 4

DifficultyLevel

670

Question

The active ingredients in a tablet, iodine and fluoride, have a combined total mass of 4.9×10−104.9 × 10^{−10} grams.

If the iodine has a mass of 9×10−119 × 10^{−11} grams, what is the mass of the fluoride?

Worked Solution

4.9×10−10 − 9×10−114.9 × 10^{−10}\ −\ 9 × 10^{−11}

= 4×10−104 × 10^{−10} grams

Question Type

Multiple Choice (One Answer)

Variables

Variable nameVariable value
question
The active ingredients in a tablet, iodine and fluoride, have a combined total mass of $4.9 × 10^{−10}$ grams. If the iodine has a mass of $9 × 10^{−11}$ grams, what is the mass of the fluoride?
workedSolution
$4.9 × 10^{−10}\ −\ 9 × 10^{−11}$ >> = {{{correctAnswer}}}
correctAnswer
$4 × 10^{−10}$ grams

Answers

Is Correct?Answer
✓

4×10−104 × 10^{−10} grams

x

4×10−114 × 10^{−11} grams

x

4.1×10−104.1 × 10^{−10} grams

x

4.1×10−114.1 × 10^{−11} grams

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