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seraphim [82]
3 years ago
12

What is the mass in grams of a single atom of Pt?

Chemistry
1 answer:
Triss [41]3 years ago
7 0

Answer:

3.23945533x10^{-22}g

Explanation:

mass of 1 atom Pt = mass of a mole of atom Pt / 6.022 x 10^{23} = 195.08/6.022 x 10^{23}  = 3.23945533x10^{-22}g

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If you have 10,000 grams of a substance that decays with a half-life of 14 days, then how much will you have after 56 days?
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Answer: 625 grams

Explanation:

14 goes into 56, 4 times.

10,000÷2=5,000 - first half life

5,000÷2=2,500 - second half life

2,500÷2=1,250 - 3rd half life

1,250÷2= 625 - 4th half life

Note: don't type "grams" after 625, just type "625".

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