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Calculate the ratio of dihydrogen phosphate to hydrogen phosphate in the blood at pH 7.4. The Ka = 6.3 x 10 -8 5. 2. For a weak acid with a pKa of 6.0 calculate the ratio of conjugate base to acid at a pH of 5.0
A gas held at 798 mmHg in a 400 mL flask is released into a 3 L flask.Whats the new gas pressure?
when a current of 0.156A is passed through a solution of lead(II) nitrate, lead is deposited at the cathode. How long will it take to deposit 0.10g of lead?
Calculate the final temperature of the water and ice together once they have reached thermal equilibrium. The specific heat capacity of water is 4.184 J/g°C. Assume no heat is lost to the surroundings during the process
how many milliliters of 0.54M HCL solution are needed to react completely with 4.6g of zinc to form zinc (II) chloride?
A distance of 200 ft must be taped in a manner to ensure a standard deviation smaller than ± 0.03 ft. What must be the standard deviation per 100 ft tape length to achieve the desired precision?
Determine the molecular formula of the compound at the temperature of 120 degrees celsius and Pressure 750 mm hg, if 1 l of the gaseous compound weighs 2.3 grams? '
Determine the trend in sizes of the ions O 2- ,N 3- , F - and also explain why does the trend exist? Also describe which of the molecules contains polar covalent bonds but is NOT itself a polar molecule?
For the reaction 2C6H6 + 15O2 → 3CO2 + 6H2O 30 grams of C6H6 are allowed to react with 79.09 grams of O2.
What volume of 0.2500 M cobalt(III) sulfate is required to react completely with a) 25.00 mL of 0.0315 M calcium hydroxide?
How many grams of Mg2SO4 is required to make up 100mL of 20g/L Mg2SO4 solution in water?
Water and toluene are very good recrystallization solvents. Why is it not useful to use these solvents for a ‘quick' recrystallization?
We do not have a reliable method for determining the number of molar equivalents of bleach being added because commercial preparations vary in concentration and "oxidizing power
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