A balloon under 1 atm of pressure contains 10.0 g of neon gas. With the temperature kept constant, 15.0 g of xenon gas is added. What happens?

The volume of the ballon expands 1.2 times

Explanation:

The pressure in the ballon will be always the same. And as temperature is also the same the only parameters that change are moles of gas and volume.

The volume is directely proportional to  moles of the gas under pressure and temperature constant (Avogadro's law). That means:

V₁ / n₁ = V₂ / n₂

Where V is volume and n moles of 1, initial statet and 2, final state of the gas

Initial moles of Neon gas (20g/mol) are:

10.0* (1mol / 20g) = 0.5 moles are equal to initial moles that occupies X liters of volume.

As you add 15.0g of Xe (Molar mass: 131g/mol):

15.0g * (1mol / 131g) = 0.11 moles + 0.55 moles = 0.66 moles that are final moles.

Replacing in Avogadro's law:

V₁ / n₁ = V₂ / n₂

X L / 0.55moles = V₂ / 0.66 moles

1.2X L = V₂

That means the volume of the ballon expands 1.2 times

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.

i don't know people like to fight everywhere rip.