Last week you reacted magnesium with a hydrochloric acid aqueous solution and hydrogen gas was produced. let's say that you collected the gas given off by the reaction and measured it's pressure as 101.2 kpa. if the vapor pressure of water is 31.4 kpa at this temperature, then what is the pressure of the hydrogen gas?

69.8 kilo Pasacl is the pressure of the hydrogen gas.

Explanation:

Pressure at which hydrogen gas collected = p = 101.2 kilo Pascals

Vapor pressure water = = 31.4 kilo Pascals

The pressure of hydrogen gas = P

The pressure at which gas was collected was sum of vapor pressure of water and hydrogen gas.

69.8 kilo Pasacl is the pressure of the hydrogen gas.

the equation that correctly represent the reaction for formation of ammonia is

n2+ 3h2 → 2nh3 (answer d)

1 mole of nitrogen gas (n2) react with 3 moles of hydrogen gas (h2) to form 2 moles of ammonia ( nh3). this is in a process known as haber process were iron is used as a catalyst and reaction take place that a higher temperature and pressure. the process is exothermic hence energy is released.

the answer is either b or c