Question 19 (5 points) Calculate AH for the following reaction:
3 SO2 (g) + 2 HNO3 (aq) + 2 H20 (1) ► 3 H2SO4 (aq) + 2 NO (g)

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.)

Find the number of grams of hcl needed to react completely with .50 moles of magnesium.

Amixture that has two or more substances that are spread out evenly is called a. compound b. heterogeneous c. substance d. homogeneous