Question Text
Question 3 :
Why is it not possible to see an atom with naked eyes?
Question 11 :
Calculate the number of moles of magnesium present in a magnesium ribbon weighing 12 g. Molar atomic mass of magnesium is $24g mol^{-1}$.
Question 12 :
What is an element which forms rust on exposure to moist air?
Question 18 :
When 3.0 g of carbon is burnt in 8.0 g of oxygen, 11.00 g of carbon dioxide is produced. What mass of carbon dioxide will be formed when 3.00 g of carbon is burnt in 50.0 g of oxygen?
