For the following equation (2naoh+> na2so4+2h2o) what mass of sodium sulfate (in grams) will be produced from 1.85 mold of sodium hydroxide, naoh?

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.)

Which of these is not an example of chemical weathering? a. iron-rich mineral rusting b. feldspar turning into clay c. limestone reacting with acid d. granite breaking up into sand

Consider the story you just read. all but one of the choices below indicate that something is living.