PLEASE HELP - show work A container has a volume of 4.5 L, a pressure of 2.75 atm and a Temperature of 450 K. How many moles of gas are in the container?

If the density of water is 1.0 g/cm3, which of these materials would float in water, based on their densities? check all that apply. aluminum cork iron lead wax

Which of the following observations indicates that there is a small, dense, positively charged part in the center of an atom? some uncharged particles are scattered by a gold foil. all uncharged particles are attracted towards a gold foil. all positively charged particles pass straight through a gold foil. some positively charged particles bounce back from a gold foil.

The number at the end of an isotope’s name is the number.