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Justtrynapassclass
11.07.2019 •
Chemistry
How many sulfur atoms are there in 21.0 g of al2s3?
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Ответ:
Given the mass of aluminum sulfide
= 21.0 g
Molar mass of
= ![2 * Molar mass of Al + 3 *molar mass of S = 2(27g/mol)+3(32.g/mol)=150.g/mol](/tpl/images/0078/1961/e93ca.png)
Calculating the moles of
:
Each mole
has 3 mol S.
Each mole S constitutes![6.022*10^{23} atoms of S](/tpl/images/0078/1961/bf377.png)
Calculating atoms of S in 0.14 mol
:
=![2.53 * 10^{23} atoms of S](/tpl/images/0078/1961/48e2b.png)
Ответ:
Acid?
Explanation:
Huh that ain't safe at all. But thanks for the points