The number of atoms in 0.004g of magnesium is close to

Explanation

Here's how to calculate the number of atoms in 0.004g of magnesium:Calculate the number of moles of magnesium:Mass of magnesium (m) = 0.004 gMolar mass of magnesium (M) = 24.305 g/mol (rounded to four decimal places for accuracy)Number of moles (n) = mass / molar massn = 0.004 g / 24.305 g/mol ≈ 0.000165 molUse Avogadro's constant to find the number of atoms:Avogadro's constant (N_A) = 6.022 x 10^23 atoms/mol (represents the number of atoms in one mole of a substance)Number of atoms = number of moles * Avogadro's constantNumber of atoms ≈ 0.000165 mol * 6.022 x 10^23 atoms/mol ≈ 1 x 10^20 atomsTherefore, the number of atoms in 0.004g of magnesium is close to 1 x 10^20.