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Vladimir [108]
3 years ago
10

What is the percentage of water in the following compound?

Chemistry
2 answers:
Rainbow [258]3 years ago
7 0

Answer: The mass percent of water in Na_2CO_3.10H_2O is 63%.

Explanation:

In Na_2CO_3.10H_2O, there are 2 sodium atoms, 1 carbon atom 13 oxygen atoms and 20 hydrogen atoms.

To calculate the mass percent of element in a given compound, we use the formula:

\text{Mass percent of water}=\frac{\text{Mass of water}}{\text{Molar mass of}Na_2CO_3.10H_2O}\times 100

Mass of water = 10\times 18g/mol=180g

Mass of Na_2CO_3.10H_2O= 286 g

Putting values in above equation, we get:

\text{Mass percent of water}=\frac{180}{286}\times 100=63\%

Hence, the mass percent of water in Na_2CO_3.10H_2O is 63%

vagabundo [1.1K]3 years ago
5 0
<span>Mass of Na2CO3, then add 10 (molecular mass of water which is 18g)

So we have 106g+180g = 286g if we are looking for the percentage of water in the compound we do this 180g/286g= 62.9

</span><span> SO2 because sulfurs atomic mass is 32g and Oxygen atomic mass is 16g</span>
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