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Which object forms when a supergiant runs out of fuel? a red giant a black hole a white dwarf a neutron star

At 450 mm hg a gas has a volume of 760 l, what is its volume at standard pressure

8) a mixture of he, ne and ar has a pressure of 7.85 atm. if the ne has a mole fraction of 0.47 and 8) ar has a mole fraction of 0.23, what is the pressure of he? a) 4.2 atm b) 3.7 atm c) 5.5 atm d) 2.4 atm e) 1.8 atm