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1. How many atoms are there in 24 grams of calcium? 2. What is the mass of one mole of calcium carbonate, CaCO3? will provide Fave answer?
With Solutions Pls
1. How many atoms are there in 24 grams of calcium?2. What is the mass of one mole of chalk which is made from calcium carbonate, CaCO3?3. The rating of some fuels depends on the %H in their composition. Given these: A) CH4O (methanol) ; B) C2H5OH (ethanol); C) C3H6O (acetone). Which of the following is the correct sequence when the following %H are arranged in decreasing order.
1 Answer
- Roger the MoleLv 73 weeks agoFavorite Answer
1.
(24 g Ca) / (40.0784 g Ca/mol) x (6.022 x 10^23 atoms/mol) = 3.6 × 10^23 atoms Ca
2.
CaCO3 = 100.0875 g/mol
3. A)
CH4O = 32.0419 g/mol
H4 = 4.03176 g/mol
(4.03176 g/mol) / (32.0419 g/mol) = 0.125827 = 12.5827% H by mass
3. B)
C2H5OH = 46.0684 g/mol
H6 = 6.04764 g/mol
(6.04764 g/mol) / (46.0684 g/mol) = 0.131275 = 13.1275% H by mass
3. C)
C3H6O = 58.0791
(6.04764 g/mol) / (58.0791 g/mol) = 0.104128 = 10.4127% H by mass
So in decreasing order of %H:
C2H5OH
CH4O
C3H6O
