A powder contains benzoic acid mixed with starch. A student finds that a 2.505 g sample of this powder requires 35.2 mL of a 0.102M sodium hydroxide solution for the acid to be neutralized. What is the percent by mass of benzoic acid in the powder? Use the correct number of significant figures and do not include units (or percent sign) or your answer will be counted wrong.

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.