General Chemistry Answers

A sample of hydrogen (H₂) gas was collected over water at 60°C.

If the total volume of gas collected was 60.5 mL and the atmospheric pressure was 1.1 bar, what mass (in g) of hydrogen gas was collected above the water?

The vapour pressure of water at 60°C is 150 torr.

Answer:

A flask contains a mixture of two gases: NO₂ and Ne. If the flask contains 0.768 mol of NO₂ and 14.8 g of Ne at a total pressure of 1.17 bar, what is the partial pressure of Ne in the flask (in bar?)

TIP: You don't need the volume of the flask nor the temperature to solve this problem.

What is the pressure (in bar) at which a gas of molar mass 30 g/mol at temperature 24.3 °C has a density of 3.66 g/L?

NOTE: The given molar mass may not correspond to an actual gas. Do not try to identify the gas.

Acetone and ethanol have boiling points of 56 °C and 78 °C, respectively. Which do expect to have a higher

vapor pressure at 25°C? Explain.

Automotive antifreeze consists of ethylene glycol, CH

2

(OH)CH

2

(OH), a nonvolatile nonelectrolyte. Calculate the

boiling point and freezing point of a 25.0 wt% solution of ethylene glycol in water.

Which among the following factors have a profound effect on the reaction rate constant

2Co(g)+O2(g)=2Co2(g)

Calculate the volume of excess oxygen gas when 150cm³ of co is burnt in 80cm³ of oxygen

You use 33.2 mL of NaOH to titrate 100.0 mL of HCI and 17.1 mL of NaOH to titrate 50.0 mL of 0.0689 M H2SO4. Calculate the unknown concentrations.

Convert 7.6 cm^3 to m^3 step by step

1. Calculate the total heat energy needed to convert 100g of ice at -10⁰C to steam at 110⁰