Question

Assertion: 2mg of calcium contains 3.011 X 10 22( 10 to the power 22) atoms. Reason: 1 mole of calcium = 40g =6.022 X 10 23.​

Answer 1

Explanation:

2 mg Calcium moles =402×10−3=5×10−5

1 mole =6.022×1023 atoms

x=6.022×10231.2×1019

=1.99×10−5 moles removed

∴ Remaining moles =5×10−5−1.99×10−5

=3.00×10−5 moles

1 g atom =1 mole