Question #3336d
1 Answer
Sep 4, 2017
Explanation:
The percent by mass is an intensive property — it does not depend on the amount of substance you have.
The formula for mass percent is
#color(blue)(barul|stackrel(" ")("Mass %" = "mass of component"/"total mass" × 100 %)|)#
Let's assume that we have 1 particle of
Then we have 1 atom of
We can use the Periodic Table to compute the masses:
#bbul("Atoms"color(white)(m)"Mass/u")#
#color(white)(ll)"1 Ca"color(white)(mmm)40.08#
#ul(color(white)(ll)"1 O"color(white)(lmmm)16.00#
#color(white)(mll)"Total = 56.08"#
∴