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Calculate the pH of a solution made by dissolving 2.89 g of sodium fluoride and 17.1 mL of 0.309 M hydrofluoric acid in enough water to make 177 mL of solution. The Ka of hydrofluoric acid is 6.8x10-4. an explanation would be great. thanks so much
1 oz of gold (density=19.3 g/ml) can be hammered into a sheet which would cover a 1.00 x 10^2 ft^2 area what is the thickness.
A piece of solid Ni metal is put into an aqueous solution of HNO3. Write the net ionic equation for any single-replacement redox reaction. Include states and charges
According to the mechanism below, what is the correct expression for the rate of consumption of A. In the mechanism, M is a molecule that collides with A and A* is a highly-energized form of A.
For each of the following cases, identify the order with respect to the reactant, A. Case (A ----> product) 1. The half-life of A increases as the initial concentration of A decreases
The hydrogen gas generated is collected over water at 25.0°C. The volume of the gas is 295 mL measured at 1.00 atm. Calculate the number of grams of sodium used in the reaction. (Vapor pressure of water at 25°C = 0.0313 atm.)
If 18.5 mL of 0.800 M HCl solution are needed to neutralize 5.00 mL of a household ammonia solution, what is the molar concentration of the ammonia.
If 10.00 mL of 0.050 M KI solution is mixed with 40.0mL of other reagents what would be the the diluted concentration of KI
Vitamin b6 is needed in the metabolism of amino acids. When it binds to an enzyme it forms a complex with the e-amino group of lysine, which is a primary amine.
What is the internal energy change for the gas. Give your answer in joules (J), accurate to three significant figures
Write the anti-periplanar Newman Projection for the first step of the elimination. Using this conformation, be sure to write the correct geometry of the resulting intermediate
A typical frostless refrigerator uses 655 kWh of energy per year in the form of electricity. Suppose that all of this electricity is generated at a power plant that burns coal containing 3.0% sulfur by mass
A 125 lb patient is to receive a drug at a rate of 0.300 mg per 1.00 kg of body weight. If the drug is supplied as a solution containing 5.00 mg/mL, how many milliliters of drug solution should the patient receive
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