Identify the spectator ions in the following complete ionic equation.
ba2+(aq)+2i−(aq)+2na+(aq)+so2−4(aq) →baso4(s)+2i−(aq)+2na+(aq)

Design techniques and materials that reduce the negative environmental impact of a structure are referred to as

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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