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3 years ago

Question 9 (1 point)

Chemistry

1 answer:

pantera1 [17]3 years ago

6 0

Answer:

8 moles of C

Explanation:

From the question given above, the following equation was obtained:

3A + 2B —> 6C

From the equation above,

3 moles of A reacted to produce 6 moles of C.

Thus, the number of mole of C produced by reacting 4 moles of A can be obtained as follow:

From the equation above,

3 moles of A reacted to produce 6 moles of C.

Therefore, 4 moles of C will react to produce = (4 × 6)/3 = 8 moles of C

Thus, 8 moles of C can be obtained from the reaction of 4 moles of A with excess B

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$\boxed {\boxed {\sf B. \ 22 \ grams}}$

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We need to use the formula for heat of vaporization.

$Q=H_{vap}*m$

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m is the mass, which is unknown.

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$\frac{50,000 \ J}{2260 \ J/g} =m$

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Round to the nearest whole number. The 1 in the tenth place tells us to leave the number as is.

$22 \ g \approx m$

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