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Hydrogen gas has a density of 0.090 g/L, and at normal pressure and 2.08 °C one mole of it takes up 22.4 L. How would you calculate the moles in 740. g of hydrogen gas? Set the math up. But don't do any of it. Just leave your answer as a math expression. Also, be sure your answer includes all the correct unit symbols. 740 g 0x16 -- ロ・ロ moles = g 2 mol o a Х ?

A chemist working as a safety inspector finds an unmarked bottle in a lab cabinet. A note on the door of the cabinet says the cabinet is used to store bottles of diethylamine, tetrahydrofuran, glycerol, methyl acetate, and dimethyl sulfoxide. The chemist plans to try to identify the unknown liquid by measuring the density and comparing to known densities. First, from her collection of Material Safety Data Sheets (MSDS), the chemist finds the following information: liquid density diethylamine 0.71 cm tetrahydrofuran 0.89 cm glycerol 1.3 8 cm methyl acetate 0.93 cm dimethyl sulfoxide 1.1 cm Next, the chemist measures the volume of the unknown liquid as 0.755 L and the mass of the unknown liquid as 671. g. Calculate the density of the liquid. Round your answer to 3 significant digits. 18/cm Given the data above, is it possible to identify the liquid? O yes O no х 5 ? If it is possible to identify the liquid, do so. diethylamine tetrahydrofuran glycerol methyl acetate dimethyl sulfoxide