How do you find formula mass of a compound?

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How do you find formula mass of a compound?

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Answer 1 · 2018-03-24T18:33:15

Got a Periodic Table....?

Explanation:

Of course you have, you are doing your chemistry homework...

So let us find the formula mass of $C a S O_{4}$ $CaSO_4$ ..

The Table tells us that the molar masses of calcium, sulfur, and oxygen, are $40.1 \cdot g \cdot m o l^{- 1}$ $40.1*g*mol^-1$ , $32.06 \cdot g \cdot m o l^{- 1}$ $32.06*g*mol^-1$ , and $16.0 \cdot g \cdot m o l^{- 1}$ $16.0*g*mol^-1$ , respectively. The mole is simply a large number so chosen that $1 \cdot m o l$ $1*mol$ of $^{1} H$ $""^1H$ ATOMS, has a mass of $1 \cdot g$ $1*g$ precisely... Of course, the elemental molar masses are listed on the Periodic Table; you are not required to remember then, tho you will soon commit the masses of the common atoms to memory..

And so we take the sum...

$Formula mass of calcium sulfate \equiv {40.10 + 32.06 + 4 \times 16.00} \cdot g \cdot m o l^{- 1} = 136.16 \cdot g \cdot m o l^{- 1}$ $"Formula mass of calcium sulfate"-={40.10+32.06+4xx16.00}*g*mol^-1=136.16*g*mol^-1$ ...

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How do you find formula mass of a compound?

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