Question

how many moles are present in 29gram sodium​

Answer 1

$\huge\underline\mathbf\red{Answer}$

The atomic number of sodium is 11. Its atomic weight is 23 u. Its molar mass is 23 g/mol.

n = m/M, where:

n = moles

m = mass

M = molar mass

n Na = 1 g Na/23 g/mol = 0.043 mol Na to two

significant figures

Because molar mass (g/mol) is a fraction, you can divide by its reciprocal (mol/g). This allows you to see how grams cancel, leaving moles.

n Na = 1 g Na × (1 mol/23 g) = 0.043 mol Na

Answer 2

1.62094356 is the answer