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oxygen forms a number of compounds with sulfur, many of which are quite reactive. one such compound is 57.20 % by mass s . calculate the number of grams of oxygen present in a sample of this compound that contains 56.00 grams of s .



Answer :

The grams of oxygen present in a sample of this compound that contains 56.00 grams of S = 41.9g of oxygen.

Calculation of quantity of Oxygen

The compound contains the following:

Sulphur = 57.20%

Oxygen = 100 - 57.20 = 42.80%

If 57.20% of the sample contains 56g of Sulphur, then 42.80% of the sample will contain X.

Make X the subject of formula,

X = 42.8 × 56/57.20

X= 1712/57.20

X= 41.9g of oxygen

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