Question

calculate the atomic mass of 46 gram of sodium​

Answer 1

No of moles of Na = mass of Sodium/molar mass

1) frist we have to divide mass of Na w.r.t molar mass of Na

#) molar mass of Na =23 gm/mol

#) no of moles of Na =46/23

=2mol

2) than we easily get the no of moless.

no of atoms in Na =2 * avocadro no= 2 * 6.03 *10^23 =12.06 *10^23 atom

3) than we have to multiply the no of moless wd avocadro no.

4.1

Number of particles = No: of moles × Avogadro no :

Given mass of Na (Sodium) = 46 g

Molar mass of Na = 23 g

No: of moles = Given mass ÷ Molar mass

= 46 ÷ 23

= 2 moles

∴ Number of particles = 2 moles × 6.022 × 10²³

= 12.044 × 10²³