Okay so you have this equation:
2H2O2 + N2H4 ——> 4H2O + N2
Grams: 9.96. 5.95. - ?
Mr: 34. 32. - 28
Moles: 0.29. 0.19. 0.19
(Mass/mr)
The ratio of n2h4 to n2 is 1:1 in this equation so the mole ratio is the same so there are 0.19 moles
Mass = mr x moles so 28 x 0.19 = 5.32g