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A 421.8 g sample of water, initially at 20.2 C, absorbs 56.19 kJ of heat. what is the temperature of the water after absorbing this heat. not that the specific heat of water is 4.182 J/g*C
Does nitro compounds cause any harmful effect on living things?
What is the molarity of a solution made by dissolving .34 moles of NaCl in 455 mL of water?
In a hydrogen atom, from what energy level must an electron fall to the n = 3 level to give a line at 1.28 micrometers in the infrared region? a. 7 b. 5 c. 6 d. 4 e
Mercury has a density of 13.6 g per mL. A barometer holding 9.50mL of mercury has broken. The cost of mercury disposal is based on mass. How many kilograms of mercury were in the barometer?
Calculate the molarity of a solution of HBr if 34.80 mL of the HBr solution neutralize 0.834 g of Na2CO3. The following is the unbalanced equation for the reaction
the outside of the flask is dried before its mass is measured. 1) Will the mass of the vapor in the flask be too high too low, or unaffected. 2) Will the molar mass of vapor in the flask be reported too high, too low, or unaffected.
A solution is prepared by dissolving a 0.56 g benzoic acid (C6H5CO2H, Ka=6.4*10^-5) in enough water to make 1.0 L of solution. Calculate [C6H5CO2H], [C6H5CO2],[H], [OH] and the pH of this solution.
a gaseous sample of a compound has a gas density of 0.977 gl at 710.0 torr and 100.0 c. what is the molar mass the
Identify the substance produced in the liver that helps catalyze this reaction.
A mixture contains H2 at 325torr pressure, N2 at 475torr pressure, and O2 at 650torr pressure. What is the total pressure of the gases in the system
some people said that the precipitate disappeared and the solution went back to a bright orange/yellow clear colour, what is the chemical equation that describes both these reactions,
which of the following electron configurations represent an excited state?
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