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Calculate ΔE, the system absorbs 7.29 kJ of heat from surroundings while its volume remains constant(assume that only P−V work can be done)? A man is 5 times as old as his son 2 years ago the sum of the squares of their age was 114 find the present age of son?answer is 7? Suppose that your mixture showed a good TLC separation with methylene chloride, but you inadvertently eluted the column with methanol.? If (1/x)+(2/y)+(3/z)=1, then z=(axy/bxy-2x-cy), where a,b, and c are positive integers. Find the value of a+b+c.? Will Richard Branson build a big base on the moon?