What is an example of a physical property that always stays the same?

A temperature

B size

C phase

D density

A gas mixture contains 3.0 mol of hydrogen (H2) and 7.3 mol of nitrogen (N2). The total pressure of the mixture is 304 kPa. What is the mole fraction and partial pressure of H2?

The pressure exerted on a sample of gas is 735 mm Hg with a volume of 375 mL and a temperature of 25 degrees Celsius. What would the pressure of the gas be if the temperature was reduced to standard temperature and the volume was expanded to 500.

NH4CO2NH2 (s) equilibrium reaction arrow 2 NH3 (g) + CO2 (g) Ammonium carbamate decomposes according to the equation above. At 40°C, an equilibrium mixture for this reaction contains 0.0640 atm CO2 and 0.370 atm NH3.

How would you prepare 70.0 ml of 0.200 m hno3 from a stock solution of 5.00 m hno3?

What is the correct formula for ammonium carbonate!

Calculate the heat evolved from a mixture of 14.1 l of sulfure dioxide

Which stament best describes a solution

Which answer accurately describes the difference between speed and velocity? Read each answer choice carefully. Question 4 options: A. If speed is constant, then velocity is also constant. B. Speed requires direction.

Least reactive element of period 3

A chemical formula shows the kind and number of Atoms that form a what? compound, mixture, solution, or suspension