Chemistry · Some Basic Concepts of Chemistry

Consider the following statements: (A) A balanced chemical equation obeys the law of conservation of mass. (B) The reactant that is present in the smallest amount is always the limiting reagent. (C) One mole of carbon dioxide contains \( 6.022 \times 10^{23} \) molecules of \( \text{CO}_2 \). (D) Empirical formula mass is always equal to molecular mass. Which of the above statements are correct?

1. A

   (A) and (C) only

2. B

   (A), (B) and (C) only

3. C
   (B) and (D) only
4. D

   (C) and (D) only