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Subject Test Chemistry

Question 6 of 17

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SAT Subject Test

Each of the questions or incomplete statements below is followed by five suggested answers or completions.  Select the one that is best in each case.

The number of oxygen atoms in 0.50 mole of text KHSO end text text end text subscript 4 end subscript is

Select an Answer

1.2 cross times 10 to the power of 23

Correct Answer: 
No

2.4 cross times 10 to the power of 23

Correct Answer: 
No

3.0 cross times 10 to the power of 23

Correct Answer: 
No

1.2 cross times 10 to the power of 24

Correct Answer: 
Yes

2.4 cross times 10 to the power of 24

Correct Answer: 
No

Each mole of text KHSO end text text end text subscript 4 end subscript contains four moles of oxygen atoms, so 0.50 mol of text KHSO end text text end text subscript 4 end subscript contains two moles of oxygen atoms. One mole is 6.0 cross times 10 to the power of 23 end exponent, and 2 left parenthesis 6.0 cross times 10 to the power of 23 right parenthesis equals 12 cross times 10 to the power of 23 equals 1.2 cross times 10 to the power of 24.

Question Difficulty: 
easy