The relationship between the molar volume of gas and Avogadro constant and what are the formulas?

The relationship between the molar volume of gas and Avogadro constant and what are the formulas?

This is a problem in chemistry of grade one in senior high school. First of all, n (amount of substance) = n (number of particles) / Na (Avogadro constant), n = V (volume of gas) / VM (molar volume of gas), so VM = V / N / na! I hope I can solve your problem

If the molar mass of a substance is m, the density ρ, the Avogadro constant n, then what is the number of molecules in the substance with volume V?

NρV/M

Come on! What's Moore and avgardro from?
Dear chemists
What's Moore from? And the afgardro constant What's a long name?
Are they important in high school chemistry?
Is it just understanding? What's the use of them?
Please! Please give me some advice!
thank you!

The amount of substance is the most basic in high school chemistry
The calculation problem basically involves
Afgardro constant is just a number, representing the number of particles in one mole of matter