PLEASE HElP! Consider the following balanced chemical equation representing the combustion of propane gas:

C3H8(g) + 5 O2(g) → 3 CO2(g) + 4 H2O(g)

The data from an experiment showed that 16.3 grams of carbon dioxide were produced. How many moles of water were expected as product? Report your answer with 3 SFs. Do NOT enter units on the final answer.

moles of H2O

Hot air balloons float in the air because of the difference in density between cold and hot air. in this problem, you will estimate the minimum temperature the gas inside the balloon needs to be, for it to take off. to do this, use the following variables and make these assumptions: the combined weight of the pilot basket together with that of the balloon fabric and other equipment is w. the volume of the hot air inside the balloon when it is inflated is v. the absolute temperature of the hot air at the bottom of the balloon is th (where th> tc). the absolute temperature of the cold air outside the balloon is tc and its density is ďc. the balloon is open at the bottom, so that the pressure inside and outside the balloon is the same. as always, treat air as an ideal gas. use g for the magnitude of the acceleration due to gravity.

Why does asexual reproduction result in offspring with identicle genetic variation

A4.86 g piece of metal was placed in a graduated cylinder containing 15.5 ml of water. the water level rose to 17.3 ml. what is the density of the metal. i need the steps of how to solve it to so i can use a formula to work out other problems.