Which statement is true of any chemical reaction? a) the mass of the reactants is always greater than the mass of the products b) the mass of the products is always greater than the mass of the reactants c) there is no relationship between the mass of the reactants and products d) the mass of the reactants equals the mass of the products

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.