Compound X has a molar mass of 283.89 mol^-1 and the following composition: element mass %
phosphorus 43.64%
oxygen 56.36%

Write the molecular formula of X .

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.

What defines the mass number of an isotope? a. the sum of the neutrons and protons b. the sum of the neutrons and electrons c. the number of neutrons d. the number of protons

Container a and container b have leaks container a has 800 ml of water is leaking 16 liter milliliters per minute container b had 1000 milliliter and liter into milliliters per minute how many minutes will it take for the two containers to have the same amount of water