4.The heat from an acetylene torch is produced by burning acetylene (C2H2) in oxygen. 2C2H2 (g) + 5O2(g)  4CO2(g) + 2H2O (g)
How many grams of water can be produced by the reaction of 2.40 moles of C2H2 with 7.40 moles of O2?

Iknow the answer to 13 is b and 14 is d. i just need to know why the correct answers are correct

Silver tarnishes as silver metal reacts with hydrogen sulfide, h2s, in the air. in this reaction, dark silver sulfide, au2s, covers the surface of silver. when silver is polished, this coating of silver sulfide can be removed from the surface. this makes the silver shiny again. enter the coefficients that balance the tarnishing reaction equation. (type 1 for no coefficient.)

Select all of the methods through which a drug can enter your body. injection swallowing inhalation absorption