Bromine, a liquid at room temperature, has a boiling point of 58c and a melting point of -7.2c. bromine can be classified as a

Bromine, a liquid at room temperature, has a boiling point of 58 degrees Celsius and a melting point of -7.2 degrees Celsius. Bromine can be classified as a pure substance. It is liquid at room temperature but evaporates very rapidly into a purple – brown choking 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.