Asample of three mixed gases is at 632.0 mmhg. if the partial pressure of co2 is 124.3 mmhg and the partial pressure of n2 is 461.9 mmhg, what is the partial pressure of o2?

45.8 mmhg

Explanation:

According to Dalton's law of partial pressure, the total pressure of a gas mixture is the sum of the partial pressure of the individual gases that make up the mixture.

Mathematically, the law can be expressed as:

In this case,

= 632.0 mmhg,

= 124.3 mmhg

= 461.9

= ?

                632.0 = 124.3 + 461.9 +

= 632.0 - + 124.3 + 461.9

                              = 45.8 mmhg

The partial pressure of O2 is 45.8 mmhg

he would use the colour black

answer : one can design an experiment using a liquid and an additive that can be added to the liquid and observe the chemical changes in the reaction species.

one would need a beaker which is filled with a known amount of the liquid in which thermometer is placed to measure the temperature changes; after addition of the additive to the liquid solution one can note down the temperature change and find whether the reaction is endothermic or exothermic in nature. by subtracting the initial temperature value with the final temperature one can find the temperature changes.

various combinations of liquid and additive can be used. liquid in this case can be a known quantity of water and additives can be epsom salt or without epsom salt the experiment can be conducted to notice the changes. water and ice, hydrogen peroxide and dry yeast, vinegar and baking soda,etc.