If a 1.85 g mass of zinc produces 475 ml of gas and your balloon weighs 0.587 g and the room temperature is 19.0°c. calculate the amount of zinc needed to produce enough gas to get your balloon airborne by adding 1 ml to the required balloon volume so that its density is less than that of the surrounding air.

Density of air at 19degC = 0.001204 g/mL

assuming that density of zinc = density of air:

volume zinc = 0.587 g / (0.001204 g/mL) = 487.54 mL

then the mass zinc required is:

mass zinc = 487.54 mL * (1.85 g / 475 mL)  = 1.9g

1.9 grams

i dont know

explanation:

question: ray weighs 100 kilograms, his wrestling partner, bobby, weighs 50 kilograms. if ray moves at 4 m s , how fast will bobby have to run at him to apply an equal amount of kinetic energy?

answer: 8 m/s he needs to run twice as fast to keep up so he has some work to do

explanation:   if the mass has units of kilograms and the velocity of meters per second, the kinetic energy has units of kilograms-meters squared per second squared.

question answered by

(jacemorris04)