How many grams of beryllium are in 147 g of mineral beryl?

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26-05-2018
Chemistry

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How many grams of beryllium are in 147 g of mineral beryl?

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kenmyna kenmyna · Answer 1 · 2018-06-04T07:59:27+02:00

The number of Beryllium that are in 147g of mineral Beryl is calculated as below

find the moles of mineral Beryl = mass /molar mass

molar mass beryl mineral (Be3Al2Si6O18)= (9x3) +(27x2) +(28 x6) +(16 x18) = 537

= 147g/537 g/mol = 0.274 moles of Be3Al2Si6O18

find the moles Be in Beryl mineral

that is 3 x 0.274=0.822 moles since there is 3 molecules of Be in beryl mineral

mass of Be is therefore =moles of Be x molar mass of Be

0.822moles x 9 g/mol = 7.4 g of Be