Answer:
A = 0.7871g
B = 0.8417g
C = 0.3192g
D = 0.3897g
Explanation:
Hello,
The number of grams of sodium (Na) in 2g of NaCl is
Molar mass of NaCl = 58.44g/mol
Molar mass of Na = 23g
23g of Na = 58.44g of NaCl
x g of Na = 2g of NaCl
x = (2 × 23) / 58.44
x = 0.7871g
Therefore, 0.7871g of Na is present in 2g of NaCl
2.
2g of Na₃PO₄
Molar mass of Na₃PO₄ = 163.94g/mol
Molar mass of Na = 23g
(3 × 23)g of Na = 163.94 g of Na₃PO₄
x g of Na = 2g of Na₃PO₄
x = (2 × 69) / 163.94
x = 0.8417g
0.8417g of Na is present in 2g of Na₃PO₄
3.
2g of NaC₇H₅O₂
Molar mass of NaC₇H₅O₂ = 144.103g/mol
Molar mass of Na = 23g
23g of Na = 144.103g of NaC₇H₅O₂
x g of Na = 2g of NaC₇H₅O₂
x = (2 × 23) / 144.103
x = 0.3192g
0.3192g of Na is present in 2g of NaC₇H₅O₂
4. 2g of Na₂C₆H₆O₇
Molar mass of Na₂C₆H₆O₇ = 236.08g/mol
Molar mass of Na = 23g
(2 × 23)g of Na = 236.08g of Na₂C₆H₆O₇
x g = 2g of Na₂C₆H₆O₇
x = (46 × 2) / 236.08
x = 0.3897g
0.3897g is present in 2g of Na₂C₆H₆O₇
