Question

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11. Can you determine the molecular weight of CaCO3, determine the no. of moles of CaCO3 you have if
you se provided with:
a, 200 Cacos
b) 6-02 % 10% molecules of CaCO3
​

Answer 1

Molecular Mass=

CaCO

Mass of 1 Calcium atom is =40

Mass of 1 Carbon atom is =12

Mass of 1 Oxygen atom is =16

Molecular Mass=Ca*1+C*1+O*3

40*1+12*1+16*3

40+12+48

100

a)No. of moles= Given Mass/Molar mass

200/100

2 Moles

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