Amixture of 02 and n2 at a total pressure of 1.6 atm is found to contain 3 mol of o2 and 7 mol of n2. the partial pressure of o2 is atm.

0.48atm

Explanation:

Firstly, we need to know the mole ratio of the oxygen gas involved. To do this, we simply place the number of moles of the oxygen over the sum of both gases.

This would be 3/(3+7) = 0.3

Now, to get the partial pressure contributed by the oxygen gas, we simply multiply the 0.3 by the total pressure

Hence, the partial pressure of oxygen = the mole fraction of oxygen * the total pressure.

= 0.3 * 1.6 = 0.48atm

answer: option (4) is the correct answer.

explanation:

areas which are at low altitudes and near the equator tend to receive direct sunlight from the sun. hence, heat energy or radiations from the sun make these areas warmer and they have warmest water.

whereas areas which are at high altitudes and away from the equator do no receive direct sunlight. hence, no direct contact from the sun makes these regions colder and thus, they have colder water.

thus, we can conclude that the statement areas at low latitudes near the equator have the warmest water because they receive the most direct sunlight best explains the relationship between an area's geography and the temperature of its surface water.

electron microscopy and scanning tunneling microscopes gives us a greater understanding of atoms by being able to see the atom itself, and lets us see some atomic reactions.

explanation: