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You have 200ml of a solution which is 0.2M NH3 and contains 0.23grams of NH4Cl. a. What type solution is it? b. What is the pH of the solution?
0.101 M HNO2 solution contains 0.0067 M H+ ions at 25 oC. What is the percent ionization of this acid under these conditions
How many mL of 0.25 m NaOH solution are required and What is a standard soluyion in an acid-base titration
A young child grows rapidly, with high levels of cell division and high energy requirements. If you were planning the child's diet, which food groups would you emphasize, and why? Which good groups would you deemphasize, and why?
canadian 10cent and 25cent coins are made of pure nickel which has a density of 8.902 gcm3. suppose each dime weighs
The heat capacity of the coffee cup (without the water) is 9.2 J/K. If the final temperature of the system is 31.1°C, what is the specific heat capacity of the alloy? (c of water is 4.184 J/g×K)
the pka of benzoic acid and 4-nitroanilinium hydrochloride are 4.2 and 1.0 respectively.a. determine the keq for the
what volume does .103 mol of N2 gas occupy at a temperature of 27 degrees Celsius and a pressure of 784 mm Hg?
1. Average speeds of gas particles (give answers in m/s) a. Calculate the average speed of Hg vapor atoms at 500oC b. Calculate the root-mean-square speed
nitrogen dioxide no2 cannot be obtained in a pure form in the gas phase because it exists as a mixture of no2 and n2o4.
Ethanol has a molar mass of 46.08g/mol and a density of 0.789g/mL. It is a clear, colorless liquid that dissolves readily in water. How many milliliters of ethanol would be needed to make 1.20L of a 2.75M solution?
Calculate how many grams of ATP must be produced to walk a mile. ATP synthesis is coupled to the oxidation of glucose (?Go' = -686 kcal/mol). How many grams of glucose are actually metabolized to produce this amount of ATP?
A pipet delivers 10.5, 10.3, 10.9 and 10.7 ml. (a)find the mean volume and deviation from the mean for each and calculate the average deviation from the mean. (b) calculate the relative deviation (in %) for this set of data.
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