1.Which of the following isnota REDOX reaction? 2.Determine the oxidation number of Cr in Li2CrO46+3.Calculate the number of grams of NaF (molar mass = 42.0) required to prepare 350 mL of a 2.50M solution. 4.How many mL of 0.300 M Ba(OH)2are required to titrate 30.0 mL of 0.250 M HClO4? 5.A mixture of gases contains 0.250 mol N2, 0.200 mol O2, and 0.100 mol Ne. If the total pressure ofthe mixture is 1.20 atm, the partial pressure of O2(in atm), is 6.Consider the pictured cylinder with a movable piston. It containsnmoles of an idealgas at a certain temperature and external pressure. If the temperature is reduced by afactor of 4 and the external pressure is reduced by a factor of 2, the piston shouldlower to one-half its pictured height.7.H2diffuses 6.0 times faster than an unknown gas. Determine the molar mass of the unknown gas. 8.A compound has the empirical formula CH2. At 430 K, 0.150 g of the gas occupies a volume of0.126 L and exerts a pressure of 1.00 atm. The molecular formula of the gas is 9.Which of the following gases will have thegreatestdensity at the same specified temperatureand pressure? 10.A certain amount of gas at 298 K and a pressure of 0.800 atm is contained in a glass vessel.Suppose the vessel can withstand a pressure of 2.00 atm. How high can you raise the temperature(in K) of the gas without bursting the vessel?
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