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1.) Which has more particles, 1.23 moles Ca or 2.36 moles Mo? How does the mass of 1.23 moles Ca compare to the mass of 2.36 moles Mo? 2.) What volume would be occupied by 2.00 mole at this gas at STP? Find the density of the gas if it has a molar mass of 2.45g. 3.) Find the number of moles in each substance: 7.84 x 10^26 atoms of chromium and 6.23 x 10^19 molecules of NH3. 4.) Find the number of moles in 2.50 grams of FePO4
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