Chemical Quantities and Calculations - All the question in the photograph please?
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"What does Hess's law say about the enthalpy of a reaction?"
Sorry, but Socratic is not a Homework answering service. Here are the answers to the questions in your first image.
1 a) ![Clip 1]()
#"Volume" = 500 color(red)(cancel(color(black)("cm"^3))) × "1 dm"^3/(1000 color(red)(cancel(color(black)("cm"^3)))) = "0.5 dm"^3#
#"Moles" = 1 color(red)(cancel(color(black)("dm"^3)))× "2 mol"/(1 color(red)(cancel(color(black)("dm"^3)))) = "1 mol"#
1 b) ![Clip 2]()
#"Moles" = 2 color(red)(cancel(color(black)("L"))) × "0.5 mol"/(1 color(red)(cancel(color(black)("L")))) = "1 mol"#
2 a) ![Clip 3]()
#"Concentration" = "4 mol"/("2 dm"^3) = "2 mol/dm"^3#
2 b) ![Clip 4]()
#"Volume" = 200 color(red)(cancel(color(black)("cm"^3))) × ("1 dm"^3)/(1000 color(red)(cancel(color(black)("cm"^3)))) = "0.2 dm"^3#
#"Concentration" = "0.3 mol"/"0.2 dm"^3 = "1.5 mol/dm"^3#
