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1. A solution of 0.250 M NaOH was used to titrate 50.00 mL of 0.250 M of a weak acid HX; (Ka= 3.6 x 10^-7) for the addition of each of the following volumes of sodium hydroxide, calculate the pH of the resultant solution: (a) 0.00 mL, (b) 5.00 mL, (c) 25.00 mL, (d) 45.00 mL, (e) 50.00 mL, (f) 51.00 mL.
A gas occupies 672 mL at 785 mmHg. What volume would it occupy at 453 mmHg at constant temp??
If the density of N2 gas in a rigid flask is 0.243 g/L at 18 °C, what is the pressure of nitrogen in the flask if it is heated to 36 °C
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)
A chemist has 4 moles of C2H6 to use in the study. How many moles of O2 will be needed in order to react all of the C2H6?
A compound contains 10.13% C, and 89.87% Cl (by mass). Determine both the empirical formula and the molecular formula of the compound given that the molar mass is 236g/mol
Calculate the number of grams of propane (C3H8) required to heat all of the water in a 50-gallon hot-water tank from 23.4 degrees C to 65.0 degrees C
The delta G for the reaction is 2.60 kj/mol at 25 degrees C. The initial pressures are P H2 = 3.34 atm, P I2 = 0.024 atm and P HI = 0.24 atm.
if 50.00ml of Ba(OH)2 solution is mixed with 30ml of HBr solution, what is the pH of the resulting solution. (0.1385 M Ba(OH)2 and 0.2050 M HBr).
How many kilograms of CO2 are produced from the complete combustion of 1.00L of gasoline assume that the gasoline has the formula C8H18.
If 7.50 g of the unknown compound contained 0.250 mol of C and 0.500 mol of H, how many moles of oxygen,O, were in the sample?
A hydrogen-filled balloon was ignited and 2.00 gram of hyrdogen reacted with 16.0 g of oxygen. How many grams of water vapor were formed?
What is the enthalpy change when a 4.0 gram sample of aluminum burns in excess of oxygen to form aluminum oxide?
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