Which statement about ahf is true?
it is zero for any compound in its standard state.
it is positive when the bonds of the product store more energy than those of the reactants.
it is negative when a compound forms from elements in their standard states.
it is zero for any element that is in the liquid state.

Suppose you mix one mole of sulfuric acid (h2so4) with 1 mole of sodium hydroxide(naoh). why does the ph of the solution remain below 7? ( explain so i can get better understanding! )

To find the work done, the force exerted and distance moved are multiplied. a couch is moved twice before you are happy with its placement. the same force was used to move the couch both times. if more work is done the first time it is moved, what do you know about the distance it was moved? a) when more work was done, the couch was moved the same distance. b) when more work was done, the couch was moved less. c) when more work was done, the couch was moved further. d) when more work was done, the couch wasn't moved at all.

Why is it that 85.48 rounded to two significant figures is 85 and not 86?