Question #c894f
1 Answer
Here's what you need to do.
Explanation:
To get the formula mass of sodium chloride,
The atomic masses of sodium and of chlorine are
#"Na: " "22.990 u"#
#"Cl: " "35.453 u"#
Since a formula unit of sodium chloride cotnains *one* sodium atom and one** chlorine atom, the formula mass of sodium chloride will be
#1 xx "22.990 u" + 1 xx "35.453 u" = "58.443 u"#
To get the percent composition of the compound, use the atomic masses of each constituent atom and the formula mass
#"For Na: " (22.990color(red)(cancel(color(black)("u"))))/(58.443color(red)(cancel(color(black)("u")))) xx 100 = "39.34% Na"#
#"For Cl: "(35.453color(red)(cancel(color(black)("u"))))/(58.443color(red)(cancel(color(black)("u")))) xx 100 = "60.66% Cl"#
So, according to the percent composition of sodium chloride, every