calculate the number of oxygen atoms and its weight in50g ofcaco3
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the chemical formula of calcium carbonate is Caco3 and it's molar mass is 100g .This means there are 6.022×10^23 units of Caco3 in 100g of Caco3
number of units of Caco3 in 100g of Caco3 =6.022×10^23
number of units of Caco3 in 1 g. Caco3= 6.022×10^23/100
number of units of Caco3 in 50g of Caco3= 6.033×10^23×50/100
= 3.011×10^23
thus there are 3.011×10^23 units of Caco3 in 50g of the compound.Now ,each unit of Caco3 contains 3 oxygen atoms so,
number of oxygen atoms in one unit of Caco3=3
number of oxygen atoms in 3.011×10^23 units of Caco3=3×3.011×10^23
= 9.033×10^23.
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number of units of Caco3 in 100g of Caco3 =6.022×10^23
number of units of Caco3 in 1 g. Caco3= 6.022×10^23/100
number of units of Caco3 in 50g of Caco3= 6.033×10^23×50/100
= 3.011×10^23
thus there are 3.011×10^23 units of Caco3 in 50g of the compound.Now ,each unit of Caco3 contains 3 oxygen atoms so,
number of oxygen atoms in one unit of Caco3=3
number of oxygen atoms in 3.011×10^23 units of Caco3=3×3.011×10^23
= 9.033×10^23.
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