Question

You have three molecules of sodium bicarbonate (formula: 3 NaHCO3). Which of the following is true?

A. The number of sodium atoms (Na) equals the number of hydrogen atoms (H).

B. The number of carbon atoms (C) is three times greater than the number of oxygen atoms (O).

C. The number of oxygen atoms (O) is less than the sum of the sodium (Na), hydrogen (H), and carbon (C) atoms.

D. The number of oxygen atoms (O) is greater than the sum of the sodium (Na), hydrogen (H), and carbon (C) atoms.

***Please explain!! :) Thank you! :)

Answer 1

If given these three molecules of sodium bicarbonate (formula: 3 NaHCO3) The answer is The number of oxygen atoms (O) equals the sum of the sodium (Na), hydrogen (H), and carbon (C) atoms.

Answer 2

Answer is: A. The number of sodium atoms (Na) equals the number of hydrogen atoms (H).

In one molecule of sodium bicarbonate (NaHCO₃) there are: one sodium atom (Na), one hydrogen atom (H), one carbon atom (C) and three oxygen atoms (O).

In three molecules of sodium bicarbonate (NaHCO₃) there are three times more atoms than in one molecule: three sodium atoma (Na), three hydrogen atoms (H), three carbon atoms (C) and nine oxygen atoms (O).

A) 3 sodium atoms = 3 hydrogen atoms.