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1. Explain what is the pH of a 0.038 M NaOH solution?
2. Benzoic acid has a Ka of 0.000063. Explain what is the pH of a 0.125 M aqueous solution of benzoic acid?
3. Explain hydrofluoric acid (HF) is a weak acid. Explain what is the conjugate base of HF that is present in an aqueous solution of HF
Convert a concentration of 4x10-4 M to millimol per milliliter. List the two types of co-factors required by certain enzymes.
Fe3O4 reacts with CO according to the reaction Fe3O4(s) + 4CO(g) --> 4CO2(g) + 3Fe(s). If 201 grams of Fe3O4 is reacted with excess CO, what mass of CO2 will be produced?
for the reaction below kp 1.16 at 800oc. caco3snbsprarr caos co2gif a 20.0 g sample of caco3 is put into a 10.0 l
How many moles of H2 gas should be taken up by 1 octene in the course of this reaction. what volume does this correspond to at STP
the vanadium in an ore sample is converted to vo2. the vo2 ions produced from the sample are then titrated with mno4-
What is the H3O+ concentration and the pH for a 0.001M HCl solution in one liter of a 0.01M CaCl2 solution. Solution is ideal. Real solution using DH Limiting Law
When gaseous F2 and solid I2 are heated high temperatuer the I2 sublimes and gaseous iodine heptofloride forms.350 torr of F2 and 4.1 gm of solid I2 are put in to a 2.5 L container at 250k and container is heated to 550k. What is final pressure. a..
What is the mass of a glucose solution that fills a 1.00 {\rm L} intravenous bottle if the density of the glucose solution is 1.15 g/mL?
Calculate the magnitude of the current in amperes if the number of moles of hydrogen gas produced is 5.99×10?4 .
A 28.0-g sample of water at 250. K is mixed with 47.0 g water at 300. K. Calculate the final temperature of the mixture assuming no heat loss to the surroundings.
a sample of riboflavin has a molar absorptivity of 1.67 x 10^3 L(mol x cm). What is the concentration of a solution with an absorbance of 0.484? The pathlength is 1.00cm.
graphite is an anisotropic conductor. it has high conductivity in the plane of the sheet and very low conductivity
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