What are SI units of the following:
(i) Density    
(ii) Molarity          
(iii) Energy    
(iv) Temperature ?


(i) kg m-3
   
 
(ii) mol m-3
       
(iii) kg m2 s-2    

(iv)  Kelvin

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The popular unit of pressure is atmosphere, how is it related to pascal?


1 atmosphere pressure = 101·324 k Pa

 
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Out of 5.00 g and 5.0 g which one is more accurate and why?


5·00 is more accurate than 5·0 because the 5.00 has been reported upto three significant figures while the latter is only upto two significant figures.
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What is iodised table salt?


It is a mixture of NaCl and Nal.

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Under what conditions air is considered as a heterogenous mixture?


Air is considered as a heterogenous mixture when dust particles are also taken into consideration.

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