Question

Atomic weight of Na is 23

atomic weight of Cl is 35
what is the percentage of sodium in NaCl?​

Answer 1

`\large \boxed{40\, \%}`

Step-by-step explanation:

1. Calculate the molar mass of NaCl

Na = 23 g

Cl = 35 g

Tot. = 58 g

2. Calculate the mass percent of Na

`\text{\% of element} = \frac{\text{mass of element}}{\text{mass of compound}} * 100 \, \% = \frac{\text{23 g}}{\text{58 g}} * 100 \, \% =\mathbf{40\, \%}}`

`\text{The percentage of Na in NaCl is $\large \boxed{\mathbf{40\, \% }}$}`