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The mass of 322 mL of hydrogen gas at 4.0 atm and -73°C is 1.21 grams. What is the density of hydrogen gas at STP?
A compound has 2 ionizable groups, with pKas of 6.2 and 9.5. A 1.0 M solution of this compound (100 mL total volume) is found to have a pH of 6.8. A biochemist adds 60 mL of 1.0 M HCl to this solution. The solution pH is now:
Assume that patient blood lead levels are 0.600 mg/L that total blood volume is 5.0 L and that 1 mol of succimer binds 1 mol of lead.
Experiment ClO2 (M) OH (M) Rate (M/s) Determine the rate law expression and calculate the value of the rate of constant.
If the initial concentration of N2O4 is 0.50 M, and no NO2 is initially present, what is the equilibrium concentration of N2O4? Kc = 0.0059 at 298 K N2O4 (g) 2NO2 (g)
What is the density of a substance if a 2.50mL sample has a mass of 0.880g at room temperature? ( show calculations) What is the specific gravity of the substance?
If 155mL of wet {grm{H}}_2 is collected over water at 24 ^circ {rm C} and a barometric pressure of 739torr , how many grams of {grm Zn} have been consumed.
Consider the solution reaction AlCl3 + 3AgNO3 -> 3AgCl + Al(NO3)3. What volume of 0.100 M AlCl3 will exactly react with 55.0 mL of 0.162 M AgNO3?
What is the percent purity of the calcium hydroxide if the titration requires 7.81 mL of the acid to reach the endpoint?
A solution is made by dissolving 3.14g of NaCl in 79.9mL of water. What is the concentration of sodium chloride in units of weight/volume percent?
An aerosol spray can with a volume of 270 ml contains 3.0 g of propane gas as propellant. what is the pressure in atms if the can is 20 degrees celsius?
Work out the solubility of copper(II)sulfide. Take it that 1 litre of the mixture weighs 1 kg. (in g/100g), CuS (s) Cu^2+ (aq) + S^2- (aq)
Heat is lost to the styrofoam calorimeter. Assuming a 6.22 C temperature change for the reaction of HCl(aq) with NaOH(aq), calculate the heat loss to the inner 2.35-g styrofoam cup. The specific heat of styrofoam is 1.34 J/gC.
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