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Which is more concentrated, 25g NaCl dissolved in 500mL of water or a 10% solution of NaCl (percent by mass)? Show work, please.

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.)

How have the greenhouse gasses increased from the year 2000 to 2018

Compare and contrast solutions and suspensions