A pressure of 30.67 atm is equivalent to how many mmHg?

How air particles exert a pressure on the inside of the balloon

Air can be considered a mixture. which statement does not explain why?

Water is called the universal solvent because more substances dissolve in water than in any other chemical. this has to do with the polarity of each water molecule. the hydrogen side of each water (h2o) molecule carries a slight positive electric charge, while the oxygen side carries a slight negative electric charge.