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The ratio between the neutrons in C and Si with respect to atomic masses 12 and 28 is:
(1) 2 : 3
(2) 3 : 2
(3) 3 : 7
(4) 7 : 3
Ans: 3 : 7
explain why boiling and meliting points of nitroalkanes than that of iosmeric alkyl nitrites
Electronic configuration of ferric ion is: (1) [Ar] 3d 5 (2) [Ar] 3d 7 (3) [Ar] 3d 3 (4) [Ar] 3d 8 Ans: [Ar] 3d 5
Methods of showing concentrations of solutions The concentration of a solution can be provided in various ways. (A) Percent by mass (B) Molarity (C) molality (D) Mo
how to determine the percentage of association or dissociation in a solution?
Entropy (S) is a molecular 'disorder', or more precisely 'the number of microscopic arrangements of energy possible in a macroscopic sample'. Entropy depends strongly on the state
Calculate the ratio of d number of molecules in two energy levels at 27''c given E2=9.75x10"-13erg/mol E1=6.95X10"-13erg/mol g1=2 g2=3
Direction of the shift of electron pair The direction of the shift of electron pair can be decided on the basis of subsequent points. (i) While the sets related to a multipl
The number of unpaired electrons in an O 2 molecule is: (1) 0 (2) 1 (3) 2 (4) 3 Ans: 2
observation table with solution
how do you convert mL/s to mol/s using the colume of oxygen at satp?
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