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What pressure will be exerted by 0.675 moles of a gas at 25*c if it is in a 0.750-l container?

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

What is a possible quantum number set for an electron in the 3s orbital of a magnesium atom