Question

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Which element has 13 as atomic no. ?

which will wiegh the highest?

a.0.2 moles of H2
b. 2 moles of CO2
c. 2 moles of caco3
d.10 moles of h20
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Answer 1

Answer:

Aluminium has 13 atomic number.

c) 2 moles of CaCO3.

Answer 2

Answer:

Aluminium has atomic number 13

Other's answer is c.