If a chemical reaction uses 140 g of N2. How many moles is this? n=m/M

Give the TUPAC name for the following compounds. Calcium nitrite________. Nitric acid _________ nitrogen triflouride

*IUPAC

What's wrong with substituting into n = m/M? n = 140/28 = ?

To calculate the number of moles, you need to use the formula n = m/M, where n represents the number of moles, m is the mass of the substance, and M is the molar mass.

In this case, you are given that the chemical reaction uses 140 g of N2. To find the number of moles, you need to know the molar mass of N2, which is the sum of the atomic masses of its constituent atoms.

The molar mass of N2 can be found on the periodic table. Nitrogen (N) has an atomic mass of approximately 14.01 g/mol, and since N2 consists of two nitrogen atoms, the molar mass is:
M = 2 * 14.01 g/mol = 28.02 g/mol

Now you can substitute the values into the formula:
n = m/M = 140 g / 28.02 g/mol

Divide 140 g by 28.02 g/mol to find the number of moles:
n ≈ 5 moles

Therefore, 140 g of N2 corresponds to approximately 5 moles.