What mass of iron is needed to react with sulfur in order to produce 96 grams of iron (|||) sulfide according to the following equation?
2fe+3s—> fe2s3

51.57 g.

Explanation:

The balanced equation: 2Fe + 3S → Fe₂S₃, it is clear that 2.0 moles of Fe react with 3.0 moles of S to produce 1.0 mole of Fe₂S₃.We need to calculate the no. of moles of Fe₂S₃:

n = mas/molar mass = (96.0 g)/(207.9 g/mol) = 0.46 mol.

Using cross multiplication we can get the no. of moles of Fe that isn eeded to produce 0.46 mol of Fe₂S₃:

2.0 moles of Fe produces → 1.0 mol of Fe₂S₃.

??? moles of Fe produces → 0.46 mol of Fe₂S₃.

∴ The no. of moles of Fe needed = (2.0 mol)(0.46 mol)/(1.0 mol) = 0.92 mol.

Now, we can get the mass of 0.92 mol Fe:

mass = no. of moles x molar mass = (0.92 mol)(55.845 g/mol) = 51.57 g.

The independent variable is the type of music.the dependent variable is the pulse rate.the intervening variable is the age of the subject.if the mother does not like rock, her pulse is likely to not increase.the same might be true for the sister.the friend may like rap and gets excited.to establish cause/effect relationship, all of the subjects must be consistent.hope i .

☆ionisation energy increases across a period from na -> ar☆ionisation energy decreases down a group from li -> fr☆ionic radius decreases across a period from na -> cl☆ionic radius increases down a groupfrom f -> ii hope it clarifies your doubts