How many moles of oxygen are needed to burn 425 get of sulfur?

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moles S = 425 g / 32.066 g/mol=13.2 

the ratio between S and O2 is 1 : 1 

moles O2 required = 13.2 

Volume of O2 at STP = 13.2 mol x 22.4 L/mol=295.7 L

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 .