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pishuonlain [190]
3 years ago
6

Determine which is greater

Chemistry
1 answer:
Shkiper50 [21]3 years ago
4 0
B. 1500m + 180m = 1680m and is the greatest

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A 0.500 g sample of phosphorous vapor exerts a pressure of 550. torr in a 73.1 mL container at 489∘C. What is the molar mass?
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Answer:

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Explanation:

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Benzoyl peroxide, the substance most widely used against acne, has a half-life of 9.8 × 103 days when refrigerated. How long wil
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7.3\times 10^2\ days

Explanation:

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Using integrated rate law for first order kinetics as:

[A_t]=[A_0]e^{-kt}

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[A_0] is the initial concentration

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5 % is lost which means that 0.05 of [A_0] is decomposed. So,

\frac {[A_t]}{[A_0]} = 1 - 0.05 = 0.95

t = ?

\frac {[A_t]}{[A_0]}=e^{-k\times t}

0.95=e^{-0.00007\times t}

t = 732.76 days = 7.3\times 10^2\ days

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