In a synthesis reaction, two atoms of sodium (Na) combine with one molecule of chlorine gas (Cl2) to produce sodium chloride (NaCl). How many molecules of sodium chloride are produced?

1. four
2. one
3. three
4. two

The answer is 2. Two atoms of sodium combine with one molecule of chlorine gas to produce sodium chloride. This means that two molecules of sodium chloride are produced.

To determine the number of molecules of sodium chloride (NaCl) produced in this synthesis reaction, we need to use the stoichiometric coefficients from the balanced chemical equation.

The balanced chemical equation for this reaction is:

2 Na + Cl2 → 2 NaCl

According to the equation, two atoms of sodium (Na) react with one molecule of chlorine gas (Cl2) to produce two molecules of sodium chloride (NaCl).

Therefore, the correct answer is 4.

To determine how many molecules of sodium chloride (NaCl) are produced in the synthesis reaction, we need to understand the stoichiometry of the reaction.

The given information tells us that two atoms of sodium (Na) combine with one molecule of chlorine gas (Cl2) to produce sodium chloride (NaCl).

From this, we can infer that in one reaction, two sodium atoms combine with one chlorine molecule to produce one molecule of sodium chloride. Therefore, the correct answer is option 2: one molecule.