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How many molecules of ethanol C2H5OH are present in 135 g of ethanol? The density of ethanol is 0.789 g/cm3?
Compute How many mg of the compound P do you have in 20ml of 4% (w/v) solution of P
Use IR tables to locate absorption bands of the stretching frequencies of the alkyne C
A colorless liquid A (C3H6O) was soluble in water and ether, and had a boiling point of 94-96 degrees Celsius. It decolorized a Br2-CH2Cl2 solution and gave a positive ceric nitrate test
A sample of neon is collected at 2.7atm and 12.0C.It has a volume of 2.25L. what would be the volume of this gas at STP.
The compound 2-methyl-1,4-pentadiene would be classified as what type of diene? Select the least stable diene listed below
At what tempature should 0.5 moles of nitrogen be held to maintain a pressure of 125 kpa in a 1.0L closed sealed container
How much heat is released when 4.50 g of methane gas is burned in a constant-pressure system? CH4 (g) + 2O2(g) -> CO2 (g) + 2H2O(l) H=-890kJ
A voltaic cell is constructed that uses the following reaction and operates at 298 K. (Ered Ni+2 is -0.277) Zn(s) + Ni2+(aq) Zn2+(aq) + Ni(s) (a) What is the emf of this cell under standard conditions?
Given mass of a gas 0.26g, pressure is 763mmHg and volume of 147mL.by using an ideal gas law calculate the molar mass of the gas
A mixture of MgCO3 and MgCO3·3H2O has a mass of 3.057 g. After heating to drive off all the water the mass is 2.790 g. What is the mass percent of MgCO3·3H2O in the mixture.
As gas expands from 1.00 L to 2.50 L against constant pressure of 820 torr. Calculate the change in internal energy for the gas, if 120 J of heat is transferred to the gas during the expansion.
The half-life of carbon-14 is 5,730 years. If you started with 100.0 g of carbon-14, how much carbon-14 would remain after 4 half-lives.
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