What mass of helium in grams is required to fill 15l balloon to pressure of 1.0 atm at 25°c?​

What is common about these molecules? a. their atoms are held together by covalent bonds. b. they are all made up of the same two atoms. c. their atoms are held together by ionic bonds. d. they are all made up of oxygen atoms only.

You have a sample of a gas that occupies a volume of 17ml at -111 degrees celsius. what volume does the sample occupy at 88 degrees celsius? show all work asap

The difference between the atomic number of an element and the element’s atomic mass is the number of ions.