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A 50.0mL sample of 0.0240 M NH3(aq) is titrated with aqueous HCl. What is the pH after the addition of 15.0mL of 0.0600 M HCl(aq) kb of NH3= 1.8x10^-5.
a mixture of gases with a pressure of 800.0 mm hg contains 60 nitrogen and 40 oxygen by volume. what is the partial
Write the balanced equation for the following reactions. Use only the following descriptions: neutralization, precipitation, gaseous, combustion, synthesis, single displacement or decomposition
A 16.0 L gas cylinder has been filled with 5.20 moles of gas. You measure the pressure to be 4.40 atm. What is the temperature inside the tank
determine the cell potential for the galvanic cell described below. pts bro4- 10.6 mm bro4- 4.9 mm ph 6.17 no3- 12.6
calculate the pH and concentration of all species present assuming that the activity coefficients are equal to 1.0 for all species
A helium-filled weather balloon has a volume of 2.4 × 102 L at 99 kPa pressure and a temperature of 0°C. What is the mass of the helium in the balloon?
the compounds magnesium oxide (MgO) and calcium sulfide (CaS) is 82.1% by mass calcium sulfide . The compound calcium sulfide is 55.6% by mass calcium. Calculate the mass (g) of calcium in the mixture.
Find the final temperature of 10kg of iron metal, initially at 25degC, after the addition of 50000 J of heat
For the next three problems, consider 1.0 L of a solution which is 0.6 M NH4Cl and 0.2 M NH3 (Ka for NH4Cl = 5.6 x 10-10). Assume 2 significant figures in all of the given concentrations so that you should calculate all of the following pH values ..
a sample of chlorine gas occupies a volume of 946ml at a pressure of 726mmhg. calculate the pressure of the gas in in
What is the mass (by difference) of a sample if the initial mass of the sample in the bottle was 27.68-g and the final mass of the bottle and sample was 23.63-g?
What is the fraction of association (α) for the following potassium propionate solutions? Ignore activities. The Ka of propanoic acid is 1.34 × 10-5.
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