Chemistry, 18.08.2019 13:30 mehnamejet92

What happens when red lead oxide is heated?

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Chemistry, 21.06.2019 22:30, 20heldmadison

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.

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Chemistry, 22.06.2019 11:20, jmwmarshall

What is the percent by mass of oxygen in fe2o3

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Chemistry, 22.06.2019 12:30, gonzalesalexiaouv1bg

The missing component to the table to the right or indicated with orange letters complete the table by filling in the corresponding numbers or symbols

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Chemistry, 22.06.2019 17:10, sophiaa23

)benzene and toluene form nearly ideal solutions. consider an equimolar solution of benzene and toluene. at 20 °c the vapour pressures of pure benzene and toluene are 9.9 kpa and 2.9 kpa, respectively. the solution is boiled by reducing the external pressure below the vapour pressure. calculate (i) the pressure when boiling begins, (ii) the composition of each component in the vapour, and (iii) the vapour pressure when only a few drops of liquid remain. assume that the rate of vaporization is low enough for the temperature to remain constant at 20 °c.