Why does the human body have different types of tissues

The mass of a neutron is equal to the mass of a proton plus the mass of an electron. true or false false true

The number of moles of a given mass of a substance can be found without knowing its molecular formula or molar mass. true false

Nitric acid can be formed in two steps from the atmospheric gases nitrogen and oxygen, plus hydrogen prepared by reforming natural gas. in the first step, nitrogen and hydrogen react to form ammonia: (g) (g) (g) in the second step, ammonia and oxygen react to form nitric acid and water: (g) (g) (g) (g) calculate the net change in enthalpy for the formation of one mole of nitric acid from nitrogen, hydrogen and oxygen from these reactions. round your answer to the nearest .