8- SO
Streek
A.
1 mol Co
4.00 x 1023 atoms Cox
6.02 x 1023 atoms Co
6.02 x 1023 atoms Co
B. 4.00 x 1023 atoms Cox
1 mol Co
Which of the following dimensional analysis setups will correctly
convert 4.00x1023atoms of cobalt to moles of cobalt? How many
moles of colbalt are there?
setup A: 0.664 mol Co
setup B: 2.41x1047mol Co
setup B :0.664 mol Co
setup A 2.41*10*mol Co

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.

Which change to the system wood cause the freely-moving piston to lower?

The volume of an unknown substance in a sealed glass jar is 50 milliliters. the volume of the jar is 200 milliliters. which state of matter could the substance be?