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A water sample contains 204 mg of CaSO4 per liter. Calculate the hardness in terms of CaCO3 equivalents
Calculate the molarity of the following solutions 1.50moles of glucose in 4.50L of glucose solution
Problem- 10.00 mL of 0.2 M HCl is diluted with 50.0 mL H2O. How much 0.1 M NaOH solution must be titrated into the HCl solution to reach the endpoint.
By titration, a water sample which was diluted tenfold had an initial DO of 9.3 mg/L, a final DO of 3.35 mg/L, an initial dilution water DO of 8.32 mg/L and a final dilution water DO of 10.33 mg/L.
Arrange the following aqueous solutions in order of increasing freezing points
Oxygen is more electronegative than nitrogen, fluorine is more electronegative than the other halogens. Fluoride is a stronger field ligand than the other halogens, but ammonia is a stronger field ligand than water. Why
State a thoughtful paper that compares how chemists of the early 20th century helped shape social policy as well as what their challenge is for the present and the future of life on this habitable planet
the specific heat of compound a is 0.50 calg degc. what amount of heat has been added to 100.0 g of compound a if the
Problem- Using only a periodic table as a guide, arrange the following atoms in order of decreasing electronegativity.
A sample of ideal gas is in a sealed container. The pressure of the gas is 695 torr, and the temperature is 27 degrees celsius. If the temperature changes to 84 degrees celsius with no change in volume or amount of gas, what is the new pressure,P2..
The rate constants of some reactions double with every 10 degree rise in temperature.Assume that the reaction takes place at 345K and 355K.what must the activation energy be for the rate constant to double as described
Write the chemical equation(s), including state symbols, for what happens when each soluble ionic compound that you identified above is placed in water. Are these substances reacting with water when they are added to water?
Utilizing the Drago E and C parameters Compute the enthalpy of formation of the 1:1 addition compound between BF3 and (CH3CH2)2O in units of kcal/mol.
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