SCIENCE
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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100
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100g
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50
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50g
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Detailed explanation-1: -Calcium has an atomic mass of 40u, and Oxygen has an atomic mass of 16u and Carbon has an atomic mass of 12u. There is just one carbon atom in the universe. As a result, the molecular mass of CaCO3 is 100 u or 100 g/mol.
Detailed explanation-2: -The relative formula mass (Mr) of calcium carbonate (CaCO3) is 100 .
Detailed explanation-3: -As CaCO3 contains only 1 mole of carbon, thus the mass of carbon present in 100g calcium carbonate, i.e., 1 mole CaCO3 is 12g.
Detailed explanation-4: -So, a 1.32 g sample of CaCO3 is required to neutralize the given HCl. Hence, the correct answer is option 3.
Detailed explanation-5: -Answer. Therefore, 100 g of calcium carbonate contains 6.022×1022 molecules.-As we know that calcium carbonate contains one calcium atom, one carbon atom and three oxygen atoms.