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The average kinetic energy of the molecules in a gas sample depends only on the temperature, T. But given the same kinetic energies, a lighter molecule will move faster than a heavier molecule.
where R=8.314 J/(mol·K) and ? is molar mass in kilograms per mole. Note that a joule is the same as a kg·m2/s2.
What is the rms speed of Cl2 molecules at 337 K?
What is the rms speed of He atoms at 337 K?
if you mix 40.0 mL of 0.366 M of K2CrO4 with 40.0 mol of 0.366 AgNO3. what mass of solid Ag2CrO4 would form?
Phosphorus pentachloride decomposes to phosphorus trichloride at high temperatures according to the reaction:
How much energy would be required to melt 48 g of HCl at its melting point of -110.8C? Hfus for HCl is 14.2 cal/g and Hvap for HCl is 98.7 cal/g.
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.
If 88 J of heat are added to a pure gold coin with a mass of 20 g, what is its temperature change? Specific heat capacity of gold is 0.128 J/g'C
A zero-order reaction has a constant rate of 3.50×10-4 M/rm s. If after 65.0 seconds the concentration has dropped to 1.00×10-2 M, what was the initial concentration?
water expands when it freezes. How much work is done by 100g of water expanding as it freezes at 0 degrees Celsius and pushes back the wall of a pipe that exerts 1070 atm of pressure?
N and H undergo a combination reaction under appropriate conditions, to yield ammonia: N2 (g) +3H2 (g) →2NH3 (g), determine how much sample of N2 in grams requires 3.0 g of H2 for complete reaction.
If a sample of Al2(SO4)3 is found to contain 863 mol of Al3+ ions how many moles of Al2(SO4)3 formula units are present?
Quinine (C20H24N2O2) is the most important alkaloid derived from cinchona bark. It is used as an antimalarial drug.
Two liters of a buffered solution are created from .55 M HC3H5O3 (Ka= 1.3 E-4) and .45 M NaC3H5O3. what is the pH of the solution?
A 54.7-g sample of aluminum at 95.0 oC is dropped into 35.0 g of water at 40.0 oC. What is the final temperature of the mixture? (specific heat capacity of aluminum = 0.89 J/goC; specific heat capacity of water = 4.184 J/g degreesC)
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