# If 2.50 L of hydrogen gas is collected over water at 40.0 c and 767mmHg, what is the volume of dry gas at standard conditions?

If 2.50 L of hydrogen gas is collected over water at 40.0 c and 767mmHg, what is the volume of dry gas at standard conditions? the vapor pressure of water is 55.3mmHg at 40.0 c.

At the same temperature, which of the following gases contains molecules with the fastest average velocity? H2, N2, O2, O3. please explain

Apiece of copper with a mass of 218 g has heat capacity of 83.9J/C. what is the specific heat of copper?

A 7.75-L flask contains 0.482 g of hydrogen gas and 4.98 g of oxygen gas at 65 C. what is the partial pressure of oxygen in the flask?

A 0.271-g sample of an unknown vapor occupies 294 ML at 140 C and 847 mm Hg.the empirical formula of the compound is CH2. what is the molecular of the compound?

275-g sample of nickel at 100.0 C is placed in 100.0g of water at 22.0 C. what is the final temperature of the water? Assume no heat transfer with surroundings. the specific heat of nickel is 0.44j/g.C and the specific heat of water 4.184 J/g.C

Determine the mole fraction of N2 in a gas mixture composed of 1.0 mole of N2 and 1.5 mole of Ar. the mixture is at 0.0 C in 10.0-liter container.

which substances has the highest vapor pressure at room temperature? HI, Hcl, HF, HBr

which has the highest surface tension at room temperature? CH4, CI4 CBr4, CF4, CCL4. please explain

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