Question

Question 9 (2 points)

Calcium oxalate is an active ingredient in witch hazel. How many moles of CaC204 are in 50.0 g?
Оа
Ob
Ос
0.39 moles
6405.00 moles
128.10 g
2.56 moles
Review Answers

Answer 1

pretty sure it’s 0.39 moles

Answer 2

0.39 moles

Step-by-step explanation:

To find how many moles are in 50.0 g of CaC₂O₄ you divide the grams of the sample by the molar mass of the compound;

`(50.0 g)/(128.097 g/mol)`=0.39 mol

The grams cancel out and you are left with moles!

I hope this help ^-^