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Why do you need to keep a mixture of NaBH4 and MeOH in ice bath. Write down equation and explain why you have to put in ice immediately.
Calculate the mass of water produced when 9.11 g of butane reacts with excess oxygen. Express the mass of water numerically in grams.
Calculate the mass of propylene glycol that must be added to 0.360 of water to reduce the vapor pressure by 2.88 torr at 40°C (Pressure of H2O is 55.3 torr at 40°C ).
prepare 250.00 mL of 0.150 M ammonium ion solution beginning with solid ammonium phosphate, (NH4)3 PO4.
This solution was titrated with 2.95*10^-3 moles NaOH. How many moles of HCl consumed by compound? How many moles of NH3 is in sample?
a solution is prepared by mixing 13.00ml of 0.0021m aqueous hg2no32 with 25.00ml of 0.015m hcl.a. will precipitation
Some organic solvents are heavier than water and some are lighter than water. If you were given a test tube filled with a heterogeneous mixture of two liquids, one layer which is water and the other an organic solvent, how do you test to see which..
What mass of O2 is required for the complete combustion of 68.9 g of pentane, C5H12, to CO2 and H2O?
Consider an electrolysis cell that might be used to electroplate nickel onto other metal surfaces. Label the anode and the cathode
a person ate 0.451 pound of cheese an energy intake of 3610 kj. suppose that none of the energy was stored in his body.
what is the least amount of energy that can be emitted by an excited electron in a hydrogen atom falling from an excited state directly to the n=3 state? what is the quantum number n for the excited state
Calculate the concentrations of hydroxide and hydronium ions in a solution prepared by dissolving 0.308 g of solid NaOH in enough water to make 225 mL of solution.
what is the minimum rate that fresh air has to be supplied to the room so that the concentration of CO2 in the room doesn't exceed 0.500% by mole? Assume the room is well mixed, and the volume of the solid dry ice does not change. mol air/min
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