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Describe how you would prepare each of the following aqueous solutions. - 230 g of a solution that is 0.60 molal in Na2CO3 starting with the solid solute. - 1.30 L of a solution that is 18.0% Pb(NO3)2 by mass. (density = 1.16 g/mL)
Calculate the wavelength in meters of light absorbed by an electron in an atom of hydrogen as it moves from n = 3 to n = 6.
A piece of metal of mass 13 g at 103?C is placed in a calorimeter containing 53.5 g of water at 21 ?C. The ?nal temperature of the mixture is 57.2 ?C. What is the speci?c heat capacity of the metal.
The pH in a lake the size of 4.0 km X 7.0 km and an average depth of 100 m is found to be 4.5. Calculate the mass of calcium carbonate that must be added to the lake water in order to raise its pH to 6.0.
What is the change is volume when 1.00 mol of CH4 reacts with 2.00 mol O2? What is the w for this chnage? Calculate the change in internal energy, U, for the change indicated by the chemical equation
The molal freezing point constant for water is 1.86 C/m. At what temperature will a mixture of 2.00 g of CaCl2(MM: 110.98g/mol) and 25.00 g of water freeze
What is the rate constant for the reaction at 85°C?
What is the molarity of a 1.304 L solution that is made from 14.80 g of NaCl?Answer in units of M.
A weak acid with the general formula of HA will react with a base, such as NaOH. Write the neutralization equation which describes the reaction.
A reaction has an activation energy of 40 kJ/mol. What happens to the rate if you increase the temperature from 70 C to 80 C? Does the rate increase by
If the average speed of an oxygen molecule is 4.43 multiplied by 104 cm/s at 25°C, what is the average speed of a CO2 molecule at the same temperature?
what is the molarity of a KOH solution if 50 mL is neutralized by 17.3 mL of a .150 M H2SO4 solution
At what temperature does the average speed of an oxegen molecule equal that of an airplane moving at 580 mph? Im confused on the setup.
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