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number 12
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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

What is the ph of a solution that has a hydrogen ion concentration of 1.0 * 10 -9 m?

Balance the following reaction. as2s3 + 9o2 → 2as2o3 + so2