If gasoline is $2.50 per gallon for regular grade, how much will it cost a commuter to drive to and from work each day if the round trip distance is 45.5 miles and his car averages 11 km/L

Your answer should have the same number or significant figures as a he starting measurement. 3201 ml =

Achemistry student weighs out of phosphoric acid , a triprotic acid, into a volumetric flask and dilutes to the mark with distilled water. he plans to titrate the acid with solution. calculate the volume of solution the student will need to add to reach the final equivalence point. round your answer to significant digits.

Three cards with holes are arranged in a straight line. a light is shined through the first card’s hole and travels through all three cards. what does this tell you about light rays? a) that light is reflected b) that light is refractive c) that light travels in a straight line d) that light does not travel in a straight line