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IrinaVladis [17]
3 years ago
15

One of the several oxides of tin found in the earthâs crust is 78.77% by mass tin. what is its empirical formula and name?

Chemistry
1 answer:
Zanzabum3 years ago
3 0
To determine the empirical formula of the compound given, we need to determine the ratio of each element in the compound. To do that we assume to have 100 grams sample of the compound with the given composition. Then, we calculate for the number of moles of each element. We do as follows:
         mass        moles
Sn     78.77       0.6636
O      21.23       1.3269

Dividing the number of moles of each element with the smallest value, we will have the empirical formula:

         moles                 ratio
Sn    0.6636          0.6636/0.6636 = 1
O     1.3269          1.3269/0.6636 = 2

The empirical formula would be SnO2.

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69.8 kilo Pasacl is the pressure of the hydrogen gas.

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Mg+2HCl\rightarrow MgCl_2+H_2

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How is 0.00036 written in scientific notation?
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