How many moles are in 124g of Tungsten? How many moles are in 74g of Mercury? How...

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Moles = grams/atomic mass or grams/molecular mass

Tungsten AM = 183.9 so moles of W = 124/183.9
Mercury AM = 200.6 so mole os Hg = 74/200.6

Molecular mass of H2SO4 = 98.08 so moles of H2SO4 = 125/98.08

one mole contains 6.022*10^23 atoms, so the no of atoms of Hg is (moles of Hg) *6.022*10^24
 
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