10cm^3 of hydrgen fluoride gas reacts with 5cm^3 of dinitrogen difluoride(N2F2) to?

Question

form 10cm^3 of a single gas. Which of the following is the most likele equation for the reaction? Show how you reach your decision.

1. HF(g) + N2F2(g)--> N2HF3 (g)

2. 2HF(g) + N2F2(g)--> 2NHF2(g)

3. 2HF(g) + 2N2F2(g) -->N2H2F4(g)

4. 2HF(g) + 2N2F2(g) --> 2N2HF3(g)

Answer 1

when u calc the ratio of 10 , 5 ,10 cm^3

u get 2:1:2

so the eq(mole) must fulfill this ratio therefore the answer is 2