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Plutonium 239 follows a first order reaction. It takes 1.89 x 10^6 years for one mole Pu 239 to decay to one atom. Find half life.
Determine which species is present in the lowest concentration in 0.10 M H3A solution?
Which of the following are true statements ?
Calculate the work done in joules, when 4.5 L of argon expands to 11 L at constant temperature against an external pressure 545 torr.
Which of the following chemical equations corresponds to the standard molar enthalpy of formation of N2O
explain why the swirling of a solution and its drying agent hastens the drying
The following results were obtained for the determination of sulfur in a coal sample. The average for 4 trials was 1.94 %S with a standard deviation of 0.04 %S. Based on these data, report the 95% confidence limits for the average sulfur content.
The volume of a sample of nitrogen gas initially at STP is decreased and at the same time the temperature is increased. What happens to the pressure of the sample?
liquid water and sealed at 25C and a pressure of 1.00 bar. What is the pressure if the temperature of the system is raised to 60.0C?
Borax is used to standardize a solution of HCl. If 0.2334 g of borax requires 24.31 mL of HCl titrant, what is the HCl concentration
hcl hbr and hi are strong acids yet hf is a weak acid. what does that mean in terms of the extent to which these
Consider the reaction: 2 K(s) + 2 H2O(l) -> 2 KOH(aq) + H2(g), DH = ? The heat released when 24.9g of K reacts with excess water is 124 kJ. Determine the enthalpy change, DH, for the above equation as written
One mole of an ideal gas is contained in a cylinder with a movable piston. The temperature is constant at 74°C. Weights are removed suddenly from the piston to give the following sequence of three pressures.
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