The chemical symbol for nitrogen gas is

Which of the following correctly represents 360 g of water?

(i) 2 moles of H₂O

(ii) 20 moles of water

(iii) 6.022 × 10²³ molecules of water

(iv) 1.2044×10²⁵ molecules of water

Which of the following statements is not true about an atom?

The chemical symbol for sodium is

Which of the following would weigh the highest?