How many moles are in 4.24kg of na2co3?

hint : you need to convert from kg to grams first
a. 4.00 x 10 -2 moles
b. 40.0 moles
c. 4.49 x 105 moles
d. 2.55 x 1028 moles

Data:
4.24 Kg converting (grams) → 4240 g

Molar Mass of 
Na = 2*23 = 46 amu
C = 1*12 = 12 amu
O = 3*16 = 48 amu
-------------------------
Molar Mass of  = 46 + 12 + 48 = 106 g/mol

If:

106 g → 1 mol
4240 g → y

Solving: Rule of three (directly proportional)

multiply cross
106*y = 4240*1
106y = 4240



B. 40.0 moles

Ithink it's carbonic acid