Which is correctly balanced? a. FeCl3(aq) + 3NaOH(aq) Fe(OH)3 (s) + 3NaCl(s)
b. 3FeCl3(aq) + 3NaOH(aq) → 3Fe(OH)2 (s) + 3NaCl(s)
c. 3FeCl3(aq) + NaOH(aq) → Fe(OH)3 (s) + 3NaCl(s)
d. FeCl3 (aq) + NaOH(aq) ► Fe(OH)3 (s) + NaCl(s)

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.)

Using data from seismic waves, geologists have learned that earth’s interior is made up of several

Which answer tells the reason the earth’s climate is getting warmer? too many animals are becoming extinct. large glaciers are melting in antarctica. the earth is moving closer to the sun. driving cars gives off gases that trap heat in the atmosphere.