Select three of the chemical equations that adhere to the conservation of mass. A
4Al+3O2→2Al2O3

B
SnO2+H2→Sn+H2O

C
AgI+Na2S→Ag2S+2NaI

D
H3PO4+5HCl→PCl5+H2O

E
4FeS+7O2→2Fe2O3+4SO2

F
C3H8 + 5O2 -> 4H2O + 3CO2

How many grams of n2h4 will be consumed by 23 g of n2o4

Suppose a lab group reports a ppercent yield of sand of 105. is it really possible to collect more sand than was originally represented? what is the possible explanation for the extra product?

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