How would the number of moles (n) of o2 change if the atmospheric pressure doubled but all other variables stayed the same

An atom of sodium-23 (atomic number = 11) has a positive charge of +1. give this information, how many electrons does it have? how many proteins and neutrons does this atom have

For each of the compounds below, show that the charges on the ions add up to zero. a. kbr b. cao c. li(2)o d. cacl(2) e. alcl(3)

What is the molar mass of a gas that has density of 2.054 g/l