Which statement describes mechanical energy

the energy that is stored in chemical bonds

the energy that is associated with temperature

the sum of the kinetic energy and the potential energy of an object

the type of energy that is associated with electromagnetic radiation

The correct answer is sum of the kinetic energy and the potential energy of an object.

Explanation:

Chemical energy is defined as the energy which is stored in the chemical bonds of a compound.

Average kinetic energy is defined as the average of the kinetic energies of all the particles. It is a measure of temperature.

Mechanical energy is defined as the sum of kinetic energy and the potential energy of the particle.

Electromagnetic energy is defined as the energy which is associated with the electromagnetic radiation.

Hence, the correct statement is sum of the kinetic energy and the potential energy of an object.

calculate how many grams of ammonia can be produced from 4.21 grams of

n2 + 3h2 = 2nh3

my answer:

25.0g n2 x (1 mol/ 28.0gn2) x (2 mol nh3/ 1 mol n2) x (17.0g nh3/ 1 molnh3) = 30.36g n2

25.0g h2 x (1 mol h2/ 2.00g h2) x (2 mol nh3/ 3 mol h2) x (17.0g nh3/ 1 mol nh3) = 141.67g h2

lr = n2