3 years ago

Write the following elements in increasing order of atomic radius. Ca, Mg, Be, Sr

Chemistry

1 answer:

Free_Kalibri [48]3 years ago

6 0

Answer:

In increasing order:

Sr, Ca, Mg, Br

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3 years ago

Determine the percent water in MgSO4*7H20?

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$\% H_2O=51.2\%$

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Hello!

In this case, since the percent water is computed by dividing the amount of water by the total mass of the hydrate; we infer we first need the molar mass of water and that of the hydrate as shown below:

$MM_{MgSO_4* 7H_2O}=120.36 g/mol+7*18.02g/mol\\\\MM_{MgSO_4* 7H_2O}=246.5g/mol$

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$\% H_2O=\frac{7*18.02}{246.5} *100\%\\\\\% H_2O=51.2\%$

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