What do we mean when we say a chemical reaction is balanced? (several choices can be correct.)

there is an equal number of solids, liquids, and gases on both sides of the reaction arrow.

there is an equal number of products on the right side of the equation as there are reactants on the left side of the

arrow.

the total number of each atom is the same on both sides of the reaction arrow.

the net charge on both sides of the reaction arrow is the same.

Aspirin has a density of 1.40 g/cm3 what is the volume in cubic centimeters of a tablet weighing 320 mg ?

You mix the pks of succinic acid are 4.21 and 5.64. how many gramsa graduate student at sdsu wants to measure the activity of a particular enzyme at ph 4.0. to buffer her reaction, she will use a buffer system based on one of the acids listed below, which acid is most appropriate for the experiment? of monosodium succinate (fw = 140 g/mol) and disodium succinate (fw = 162 g/mol) must be added to 1 l of water to produce a solution with a ph 5.28 and a total solute concentration of 100 mm? (assume the total volume remains 1 liter, answer in grams monosodium succinate, grams disodium succinate, respectively.) volumes of 0.05 m nah2po4 and 0.05 m na2hpo4 (pk's for phosphoric acid are 2.15, 6.82 and 12.38). which of the following best describes the resulting solution?

Which of the following represents the ester functional group? a. -coo- b. -cho c. -cooh d. c=o