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Advocard [28]
3 years ago
14

The half-life of f-20 is 11.4 seconds. when there are 200 atoms of f-20 in a sample, a scientist starts a stopwatch. the scienti

st stops the stopwatch at 34.2 seconds; there are _____ atoms of f-20 remaining.
Chemistry
1 answer:
prisoha [69]3 years ago
7 0
There should only be 25 atoms remaining
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Silicon carbide (SiC) is an important ceramic material made by reacting sand (silicon dioxide, SiO2) with powdered carbon at a h
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Answer:

Percent yield of SiC is 77.0%.

Explanation:

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So, 100.0 kg of SiO_{2} = \frac{100.0\times 10^{3}}{60.08} moles of SiO_{2} = 1664 moles of SiO_{2}

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