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Subject Test Chemistry

Question 1 of 17

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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.

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When the equation for the reaction represented above is balanced and all coefficients are reduced to lowest whole-number terms, the coefficient for text HCl end text is

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1

Correct Answer: 
No

2

Correct Answer: 
No

3

Correct Answer: 
No

4

Correct Answer: 
No

6

Correct Answer: 
Yes

Since there are three text Cl end text atoms and two text H end text atoms on the left side of the equation, the number of  text HCl's end text on the right side must be divisible by 2 and by 3. The coefficient for text HCl end text is at least 6. If it is 6, then there are 2 text B end text text Cl end text subscript 3 end subscript text 's end text text end text, 3 text H end text subscript 2 end subscript text 's end text, and 2 text B's end text. These numbers do indeed result in a balanced equation where the coefficients are the lowest whole numbers possible.

Question Difficulty: 
easy