How many moles are in 50.0 g of each of the following substances:?

2 ⤊

How many moles are in 50.0 g of each of the following substances:?

a. CS2
b. Al2(CO3)3
c. LiNO3
"1 mole = 6.022 x 10^23 atoms, or molecules"

2007-02-27 16:16:44 · 2 answers · asked by honest abe 4 in Science & Mathematics ➔ Chemistry

2 answers

a. 50g x 1mol/76.15 g= .657 mol
(12.01 +32.07 x 2 = 76.15)
b. 50g x 1mol/233.99= .214 mol
( 26.98x 2+ 12.01x3 + 16x9 = 233.99)
c. 50gx 1mol/68.95g=.725 mol
( 6.94+14.01+16x3= 68.95)
you dont need to use avogadros number to solve this, however if they asked you to determine how many atoms were in it, then you would just multiply by that number.

2007-02-27 16:33:20 · answer #1 · answered by loveboatcaptain 5 · 1⤊ 0⤋

Find the molar mass of each.
a. 50g/ 76.1 g/mol = .657 mol
b. 50/ 233.86 g/mol = .214 mol
c. 50g/ 68.95 g/mol = .725 mol

2007-02-27 16:24:24 · answer #2 · answered by nothereanymoreomgteh 4 · 1⤊ 0⤋