Which type of mixture can be separated using a sieve? a: a homogeneous mixture with components of varying sizes b: a homogeneous mixture with components of the same size c: a heterogeneous mixture with components of the same size d: a heterogeneous mixture with components of varying sizes

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.

a compound is a molecule made of atoms from different elements.

a. by the combination of an unlimited number of elements