Question

2. Write the formula wit mass of Nazouis​

Answer 1

Answer:

142g

Explanation:

• formula of Nazouis is Na2SO4
• atomic mass of sodium (Na)= 23
• number of atoms of Na=2
• atomic mass of sulphur (s)=32
• number of atoms of (s)=1
• atomic mass of oxygen (O)=16
• number of atoms of(O)=4

hence molar mass of Na2SO4=

(2×23)+(1×16)+(4×16) = 42 + 32 + 64 = 142

there fore molar mass of Na2SO4 = 142g