Question

calculate the number of mole , molecular in 200gm of caco3. Also calculate the number of atoms of CA , C , O and also calculate the number of e??​

Answer 1

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So first you have to calculate the molar mass of CaCO3. We have one atom each of Calcium and Carbon and three atoms of Oxygen in one molecule of CaCO3. So the molecular mass will be

40u +12u +(16*3)u

=100u

Now the molar mass will be the molecular mass in grams. So the molar mass of CaCO3 is 100grams. This means 1 mole of CaCO3 is equal to 100g.

=> 1g of CaCO3 = 1/100 mole

=> 1*200 g = (1/100) * 200 moles

=> 200g of CaCO3 = 2 moles

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