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What mass of carbon dioxide is present in 1.00 cm^3 of dry air at a temperature of 15 0C and a pressure of 697 torr?
Multiple choice questions in free energy change and What is the free energy change in kJ/mole?
Radio waves travel at the speed =3.00 108 m/s(speed of light,). if Saturn is 7.9 108 km from Earth then Determine how many minutes does it take for a radio message to reach Earth from Saturn?
A piece of metal of mass 18 g at 117 C is placed in a calorimeter containing 48.2 g ofwater at 21C. The final temperature of the mixture is 85.4C.
What was the initial temperature of the Cu metal If the final temperature of the Cu-H 2 O mixture was at twenty five degree celsius? (The specific heat of copper = 0.377 J/(g°C).)
What is the partial pressure of hydrogen and nitrogen when the gas mixture is composed of 8.00 g hydrogen and 56 grams nitrogen.
What is the concentration of unknown acid solution? Write the neutralization reaction, balance it, name the products THEN Solve the problem above.
A solution containing 80 g of KCl in 200 g of water at 50 0 C is cooled to 20 0C, a) How many grams of KCl remained in solution at 20 0C and b) How many grams of KCl crystallized out
Determine what is the exact volume of the 250-mL Erlenmeyer flask express your answer (in mL)?
Determine the molar mass of the substance if 120.0 grams of a pure sample contained 24.0 mol of the substance. Express your answer in g/mol.?
A chemical reaction takes place in a container of cross-sectional area 100 cm2. As a result of the reaction, a piston is pushed out through 21 cm against an external pressure of 534 torr.
What is the molecularity of the following elementary reaction? NH2Cl(aq) + OH¯(aq) -> NHCl¯(aq) + H2O(l)
A 100 g sample of an unknown liquid absorbs 2000 J of heat energy, raising the liquid's temperature from 50 ?C to 70 ?C .What is the speci?c heat capacity of this liquid.
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