Question

Sodium reacts with chlorine to form the compound sodium chloride, or salt. The chemical formula below shows how the two elements combine into a compound.
2Na + Cl(2) -> 2NaCl

A) 116.88 amu
B) 60 Amu
C) 58.44 amu
D) 29.22 amu

Answer 1

To calculate the molecular mass of sodium chloride (NaCl), we need to add up the atomic masses of sodium (Na) and chlorine (Cl).

The atomic mass of sodium (Na) is 22.99 amu, and since there are two sodium atoms in the compound, we multiply this by 2:
2 x 22.99 amu = 45.98 amu

The atomic mass of chlorine (Cl) is 35.45 amu, and since there is only one chlorine atom in the compound, we multiply this by 1:
1 x 35.45 amu = 35.45 amu

Adding up the atomic masses of sodium and chlorine, we get:
45.98 amu + 35.45 amu = 81.43 amu

Therefore, the molecular mass of sodium chloride (NaCl) is 81.43 amu.

None of the given options match the calculated molecular mass of sodium chloride.

Answer 2

2Na + Cl2 -> 2NaCl

Answer 3

To calculate the molecular mass of sodium chloride (NaCl), we need to add up the atomic masses of sodium (Na) and chlorine (Cl).

The atomic mass of sodium (Na) is 22.99 amu, and since there are two sodium atoms in the compound, we multiply this by 2:
2 x 22.99 amu = 45.98 amu

The atomic mass of chlorine (Cl) is 35.45 amu, and since there is only one chlorine molecule (Cl2) in the equation, we use the atomic mass of Cl2:
35.45 amu x 2 = 70.9 amu

Adding up the atomic masses, we get:
45.98 amu + 70.9 amu = 116.88 amu

Therefore, the molecular mass of sodium chloride (NaCl) is 116.88 amu.

So the correct answer is A) 116.88 amu.