What fraction of a sample of carbon-14 would remain unchanged after 11,430 years?

How many grams of co(g) are there in 74.5 ml of the gas at 0.933 atm and 30o c?

Which diagram shows the correct way to represent an ionic compound of magnesium oxide?

Use this information to determine the number of calends electrons in the atoms. which of the following correctly compares the stability of the two atoms? a) both are unreactive b) both are highly reactive c) a is unreactive and d is reactive d) a is reactive and d is unreactive