IXL Science (PLS HELP)

Which compound contains both ionic and covalent bonds? a) hbr b)cbr4 c)nabr d) naoh

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

Why does a plastic bottle that is sealed at a high altitude change it’s shape when taken to lower altitude