Helium gas in a 2L cylinder is under 1.12 atm of pressure at 36.5 oC. The same gas sample has a pressure of 2.56 atm when the temperature is increased. What was the final temperature (in Kelvin) of the gas in the cylinder? Note - Put your answer (up to 1 decimal and the unit), in the blank.

Why is the vapor pressure of a warm lake higher than the vapor pressure of a cold lake? o a. warm water has a greater heat of vaporization. ob. warm water evaporates more quickly. cool water evaporates more quickly. od. cool water has a greater heat of vaporization.

Name the element in group 17, period 2. (periodic table)

Ican determine the molar mass of an element by looking on the under the atomic mass for the element. for example the molar mass of phosphorus is 30.974 grams/mole. avogadro’s number tells me the amount of representative particles in 1 mole of any substance. this means 12.011 gram sample of carbon and a 32.0 gram sample of sulfur have the same number of atoms.