Aparticular compound in the chemistry laboratory is found to contain 7.2x10^24 atoms of oxygen, 56.0g of nitrogen, and 4.0 mol of hydrogen. what is it’s empirical formula?

The empirical formula for the compound is :

or , NHO3

Explanation:

Empirical formula : It is the simplest ratio of atoms  present in a compound.

Calculate number of moles of H , N and O using formula :

Avogadro number is represented by N0 and contain =

atoms

1.Calculate number of moles of O

Number of Atoms =

Insert value in :

O =  11.95 mole  = 12.0 mole

(11.95 is almost equal to 12 )

2.Calculate number of moles of N

Given mass = 56 .0 g

Molar mass of N = 14 g/mol

N = 4.0 mole

3.Calculate number of moles of H

Already given in moles

H = 4.0 moles

3.Calculate Simple ratio : Divide the moles of each H ,O ,N by the 4.0 mole ( It is the smallest number)

Ratios Are :

O = 3

N = 1

H = 1

So the empirical formula should be :

or

NHO3

it is important to conserve water because there is very limited amount of freshwater here on earth and if we are not smart about how we use it we will only be runnning out of our supply faster than neccessarry.

answer: enthalpy

explanation:

for a exothermic reaction, the energy is released i.e. the energy of the products is lower than the energy of the reactants.

= enthaply

= energy of products

= energy of reactants

as , thus comes out to be negative. negative value of enthalpy shows that the reaction is exothermic.