How are the depth of a dive and pressure related

Making and Using Graphs For centuries, people have dived deep into the sea to collect items such as pearls. Nowadays, single-breath diving has become competitive. On January 18, 2000, Francisco Pipin Ferreras from Cuba set a new record with a dive of 162 meters. He was underwater for 3.2 minutes. 

Use the data in the table to make a graph of pressure versus depth. 

What would the pressure be at the surface of the water What does this value represent  

How do the partial pressures of nitrogen gas and helium gas compare when a mole of nitrogen gas and a mole of helium gas are in the same closed container Refer to Table C-1 in Appendix C for a key to atom color conventions. 

Dalton s law of partial pressures When Dalton studied the properties of gases, he found that each gas in a mixture exerts pressure independently of the other gases present. Dalton s law of partial pressures states that the total pressure of a mixture of gases is equal to the sum of the pressures of all the gases in the mixture. The portion of the total pressure contributed by a single gas is called its partial pressure. The partial pressure of a gas depends on the number of moles of gas, the size of the container, and the temperature of the mixture. It does not depend on the identity of the gas. At a given temperature and pressure, the partial pressure of one mole of any gas is the same. Dalton s law of partial pressures can be summarized as 

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