What volume will 5.0 moles of sulfur hexafluoride (SF6) gas occupy if the temperature and pressure of the gas are 128°C and 9.4 atm?

The atomic number is always a whole number, and is equal to the number of protons. This defines the element. The mass number is also a whole number and is equal to the sum of the protons plus neutrons in the nucleus.

Different isotopes of the same element have different mass numbers. For example, Carbon-12 has 6 protons and 6 neutrons; Carbon-14 has 6 protons and 8 neutrons. The atomic mass seen on the periodic table is not usually a whole number because it is a weighted average of all the known isotopes of the element.

For example, carbon is shown as 12.01 because the vast majority of them are carbon-12. Hydrogen is shown as 1.01 because most are hydrogen-1, but some are hydrogen-2 (deuterium) and hydrogen-3 (tritium). Hope this helps.

The atomic number is always a whole number. It stands for the number of protons in the nucleus.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.