Which substance is most likely to heat up the fastest? water (specific heat of 4.19 /g • C°) copper (specific heat of .39 /g • C°) aluminum (specific heat of .90 /g • C°) dry air (specific heat of 1.01 /g • C°)

How many liters of hydrogen gas will be produced at stp from the reaction of 7.179×10^23 atoms of magnesium with 54.219g of phosphoric acid (h3po4) the equation is 3mg + 2h3(> mg(po4)2+3h2

Which characteristics can be used to differentiate star systems? check all that apply.

Which statement correctly identifies the scientific question and describes why the question is scientific? question 1 refers to the supernatural.question 2 reflects a moral or social value.question 3 refers to something that can be measured.question 4 reflects a question that can’t be observed.