For our sample energy scoring sheet, how do we calculate the energy of roasting?

When the volume and number of particles of a gas are constant which of the following is also constant

Consider the story you just read. all but one of the choices below indicate that something is living.

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! )