GFEWERTGB TGBNJU&YTFVB NHY^TRFC BHYTRFCVBHU&^%$RFGVHYTRDCVBGHYT %RFGY^%$RFVBGHY^%RDFCVBHY^%TFGVBNJU TYGVBNJU^&TFGVBNHJUI*&^TGBH NHJUI*&^YTGBNJMIUHJKI*&^TYG BNJU&^TYGBNJHGV NJU&YTGVB NJU&YTGVB NHU&^TGVBNJI*&YGHBNJUTYGBNJ UI*&^YTGBNMJKI*&YHNM

Which of these would be caused by a chemical change? a) the formation of lava. b) sedimantary rock layering over time. c) metamorphic rock forming from igneous. d) metamorphic rock eroding to form sedimentary rock.

If a solution is considered basic, then a) the hydroxide ion and hydronium ion concentrations are equal. b) the hydroxide ion concentration is less than the hydronium ion concentration. c) the hydronium ion concentration is greater than the hydroxide ion concentration. d) the hydroxide ion concentration is greater than the hydronium ion concentration.

What is the percent by mass of oxygen in fe2o3