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about mole
發問:
explain why 1 mole of magnesium atoms is twice the mass of 1 mole of carbon atomswhat mass of magnesium contains the same number of atoms as 12 g of carbon?what mass of oxygen contains the same number of molecules as 56 g of nitiogen?what mass od chlorine contains the same number of molecules as 36g of... 顯示更多 explain why 1 mole of magnesium atoms is twice the mass of 1 mole of carbon atoms what mass of magnesium contains the same number of atoms as 12 g of carbon? what mass of oxygen contains the same number of molecules as 56 g of nitiogen? what mass od chlorine contains the same number of molecules as 36g of water? 更新: but i would like to know why the molar mass of magnesium is 24g but not 24.3g?
最佳解答:
Explain why 1 mole of magnesium atoms is twice the mass of 1 mole of carbon atoms. Mass of 1 mole of Mg atoms = Molar mass of Mg atoms = 24 g mol-1 Mass of 1 mole of C atoms = Molar mass of C atoms = 12 g mol-1 24 g mol-1 is twice of 12 g mol-1. Therefore, the mass of 1 mole of Mg atoms is twice the mass of 1 mole of C atoms. ========== What mass of magnesium contains the same number of atoms as 12 g of carbon? Mg contains the same number of atoms as 12 g of C if they have the same number of moles of atoms. No. of moles of C = mass/(molar mass) = 12/12 = 1 mol No.of moles of Mg = No. of moles of C = 1 mol Mass of Mg = (molar mass) x mol = 24 x 1 = 24 g ========== What mass of oxygen contains the same number of molecules as 56 g of nitrogen? O2 contains the same number of molecules as 56 g of N2 if they have the same number of moles of molecules. No. of moles of N2 = mass/molar mass = 56/28 = 2 mol No. of moles of O2 = No. of moles of N2 = 2 mol Mass of O2 = (molar mass) x mol = 32 x 2 = 64 g ========== What mass of chlorine contains the same number of molecules as 36g of water? Cl2 contains the same number of molecules of 36 g of H2-O if they have the same number of moles of molecules. No. of moles of H2O = mass/molar mass = 36/18 = 2 mol No. of moles of Cl2 = No. of moles of H2O = 2 mol Mass of Cl2 = (molar mass) x mol = 71 x 2 = 142 g
about mole
發問:
explain why 1 mole of magnesium atoms is twice the mass of 1 mole of carbon atomswhat mass of magnesium contains the same number of atoms as 12 g of carbon?what mass of oxygen contains the same number of molecules as 56 g of nitiogen?what mass od chlorine contains the same number of molecules as 36g of... 顯示更多 explain why 1 mole of magnesium atoms is twice the mass of 1 mole of carbon atoms what mass of magnesium contains the same number of atoms as 12 g of carbon? what mass of oxygen contains the same number of molecules as 56 g of nitiogen? what mass od chlorine contains the same number of molecules as 36g of water? 更新: but i would like to know why the molar mass of magnesium is 24g but not 24.3g?
最佳解答:
Explain why 1 mole of magnesium atoms is twice the mass of 1 mole of carbon atoms. Mass of 1 mole of Mg atoms = Molar mass of Mg atoms = 24 g mol-1 Mass of 1 mole of C atoms = Molar mass of C atoms = 12 g mol-1 24 g mol-1 is twice of 12 g mol-1. Therefore, the mass of 1 mole of Mg atoms is twice the mass of 1 mole of C atoms. ========== What mass of magnesium contains the same number of atoms as 12 g of carbon? Mg contains the same number of atoms as 12 g of C if they have the same number of moles of atoms. No. of moles of C = mass/(molar mass) = 12/12 = 1 mol No.of moles of Mg = No. of moles of C = 1 mol Mass of Mg = (molar mass) x mol = 24 x 1 = 24 g ========== What mass of oxygen contains the same number of molecules as 56 g of nitrogen? O2 contains the same number of molecules as 56 g of N2 if they have the same number of moles of molecules. No. of moles of N2 = mass/molar mass = 56/28 = 2 mol No. of moles of O2 = No. of moles of N2 = 2 mol Mass of O2 = (molar mass) x mol = 32 x 2 = 64 g ========== What mass of chlorine contains the same number of molecules as 36g of water? Cl2 contains the same number of molecules of 36 g of H2-O if they have the same number of moles of molecules. No. of moles of H2O = mass/molar mass = 36/18 = 2 mol No. of moles of Cl2 = No. of moles of H2O = 2 mol Mass of Cl2 = (molar mass) x mol = 71 x 2 = 142 g
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