Answer:
The answer is A, 1:2 and 1:4
Explanation:
This can be derived from looking at the balanced chemical equation. Notice the coefficients in front of each reactant and product. These show the mole ratios of each compound necessary to form the balanced equation.
Nâ‚‚Hâ‚„ does not have a coefficient, which automatically becomes 1. Hâ‚‚Oâ‚‚ has a coefficient of 2, making the ratio between the two 1:2. Hâ‚‚O has a coefficient of 4 making the ratio between hydrazine and water 1:4. Hope this helps!