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The correct answer is 4.66g of

Explanation:

We can use basic stoich to get this question. There are .336271 moles of in 5.38g of it(divide by 15.999*2).

the density(ratio between mass and volume as m/v) decreases from top to bottom in periodic table group as the size increases and nuclear charge decreases. but in periods density increases from left to right as atom size decreases and nuclear charge increases.

6.4 cm (max) - 25 cm (min)