how many moles of oxygen gas are consumed in the production of 5.00 g of iron(III) oxide from metallic iron

In a certain pentagon, the interior angles are a,b,c,d,e where a,b,c,d,e are integers strictly less than 180. ("strictly less than 180" means they are "less than and not equal to" 180.) if the median of the interior angles is 61 and there is only one mode, then what are the degree measures of all five angles?

Find the distance between the pair of points a(-1,8) and b(-8,4)

Write an inequality for this sentence the quotient of a number and -5 increased by 4 is at most 8