a certain element X reacts with sulphur to form the compound X2 S5. if 0.296g of the element forms 0.616 g of compound what is the molar mass of the element X?
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Explanation:
2X + 5S= X2S5
mass of X= 0.296g
mass of X2S5=0.616g
as per law of conservation of mass.
mass of sulphur = 0.616g - 0296g= 0. 32g
no of moles of sulphur = 0.32/32= 0.01 mol
no. of moles of element X= 2*0.01=0.02mol
molar mass of X= 0.296/0.02= 14.8 g /mol
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