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peter onoriode
Questions (3)
400cm3 of nitrogen at 30degree celsius is heated at constant pressure to a temperature 50degree celcius.find the new volume of
2 answers
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The poH of a solution of 0.25mol/dm3 of Hcl acid is
1 answer
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A block of weight 200N rest on a rough horizontal table when the block just begin slip the pulling force found to be 40N,what
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Answers (1)
solution The hydrogen ion concen.(H+),of the acid is 0.25moldm3 ie(H)=0.25 but ph=-log{H+} ie pH=-Log{0.25} =-log{2.5*10`} =-0.398+1=0.602 but pH+pOH=14 i.e 0.60+pOH=14 ^pOH=14-0.60 =13.40
