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What is the pH of an aqueous solution of 3.99×10-2 M nitric acid?
pH =
2NOBr(g) 2NO(g) + Br2(g)
If 0.364 moles of NOBr(g), 0.448 moles of NO, and 0.543 moles of Br2 are at equilibrium in a 19.1 L container at 464 K, the value of the equilibrium constant, Kc, is .
An aqueous solution is made by dissolving 29.4 grams of nickel(II) nitrate in 403 grams of water.
The molality of nickel(II) nitrate in the solution is m
5
.
When you take a bath, how many kilograms of cold water (10°C) must you mix with hot water
(50°C) so that the temperature of the bath is 35°C? The total mass of water is 180 kg. Ignore any
heat flow between the water and its surroundings.
An aqueous solution of sodium bromide, NaBr, contains 3.40 grams of sodium bromide and 17.4 grams of water.
The percentage by mass of sodium bromide in the solution is %.
The equilibrium mixture is found to contain 0.07, 0.11,0.03 and 0.03 moles of CO ,H2, CH4, H2O respectively for the reaction:
CO(g)+3H2(g)0. CH4=H2O(g)
You need to make an aqueous solution of 0.140 M potassium nitrate for an experiment in lab, using a 125 mL volumetric flask.
How much solid potassium nitrate should you add?
blank grams
In the laboratory you dissolve 18.5 g of nickel(II) bromide in a volumetric flask and add water to a total volume of 125 . mL.
What is the molarity of the solution? M
Given the population 3 5,7,9,11,13
How many samples can be made from the population with sample size of 3?
Calculate the mean of the sampling distribution
Compute the variance o the sampling distribution
What is the pH of the solution containing 0.20 M NH3 and 0.15 M NH4Cl?
