1 mole of HNO3 acid has 63 g....the no. of moles of HNO3 for 580g is:= 580 ×1/63.=580/63.= 9.19 moles. .I.e .9.2 moles approximately.....

Calculating the number of moles in 580 grams of HNO3 acid:

To calculate the number of moles in a given mass of a substance, we need to use the formula:

Moles = Mass / Molar mass

1. Determine the molar mass of HNO3:
HNO3 is composed of one hydrogen atom (H), one nitrogen atom (N), and three oxygen atoms (O). To calculate the molar mass, we need to sum up the atomic masses of each element.

The atomic masses are:
- Hydrogen (H): 1 gram/mol
- Nitrogen (N): 14 grams/mol
- Oxygen (O): 16 grams/mol

Therefore, the molar mass of HNO3 is:
(1 * 1) + (1 * 14) + (3 * 16) = 1 + 14 + 48 = 63 grams/mol

2. Calculate the number of moles:
Now that we know the molar mass of HNO3 is 63 grams/mol, we can calculate the number of moles using the formula mentioned earlier:

Moles = Mass / Molar mass
Moles = 580 grams / 63 grams/mol

Moles = 9.206 moles

Therefore, there are approximately 9.206 moles of HNO3 acid in 580 grams.

Summary:
- HNO3 has a molar mass of 63 grams/mol.
- To calculate the number of moles, divide the given mass (580 grams) by the molar mass of HNO3 (63 grams/mol).
- The calculation yields approximately 9.206 moles of HNO3 acid in 580 grams.