Exactly 75.00 mL of a 333.3 ppm (w/v) sodium sulfite (MM=126.041 g/mol), solution is treated with 150.0 mL of 3.894x10^-3 M perchloric acid (MM= 100.457 g/mol), which results in the formation of sulfur dioxide (MM=64.064 g/mol), water (MM=18.015 g/mol), and sodium perchlorate (MM=122.438 g/mol). What is the ppm (w/v) of the excess reactant once the reaction is complete?

Sandy is building a small toy car. he wants to use a balloon to power the toy car. he fills a balloon with air and then attaches a straw to the balloon. he tapes the balloon-straw combination to the car and then releases the end of the balloon. the toy moves forward as the air from the balloon comes out the back of the straw. what can sandy do to make the toy car move faster? a) use less air in the balloon. b) blow up the balloon more. c) use a longer straw. d) use larger tires.