Question

calculate the number of particles in 46 g of Na atoms

Answer 1

Are you familiar with Avogadro's number?

Answer 2

molar mass = grams per mol (units)
you're going to need your periodic table to look up the molar mass of sodium (Na)

Answer 3

First find the molar mass of Na. Then find the number of moles in 46g of Na using the formula:

moles = mass / molar mass

Then you can find out how many particles there are using avogadro's number! 1 mol = 6.02 * 10^23 particles