How can an atom become and ion with a 2+ charge

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

Which compound contains both ionic and covalent bonds? a) hbr b)cbr4 c)nabr d) naoh

Explain how the integumentary system plays a crucial role in the ability to maintain homeoestasis