If, in the reaction below, 49 grams if Fe3O4 produced a 78.25% yield of Fe. How many grams are produced? Fe3O4 + 4H2 -> 3Fe + 4H2O

Help with this please :(

22. a flask containing 450 ml of 0.50 m h2so4 was accidentally knocked to the floor. how many grams of nahco, do you need to put on the spill to neutralize the acid according to the following equation: h2so4(aq)+2 nahcos(aq) na, so(aq) +2 h20()+2 co2(g) d) 38 g a) 2.3 g b) 9.5 g c) 19 g

Drug abuse will not lead to physical and psychological dependence. true or false ?

Measurements that have similar values are: a. usually accurate b. sometimes accurate c. always accurate d. never accurate