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Number of nodal centres for 2s orbital:
(1) 1
(2) 0
(3) 4
(4) 3
Ans: 1
if one ton contains 2000 pounds and the coal is 2% by mass sulfur, what is the mass sulfur in one ton of coal? how many grams of sulfur is this? how many moles of sulfur is this?
equation of hess''s law
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Characteristics?
3 kinds of isomerism indienes alkynes
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