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saki
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1/tan beta +tan beta=sec^2 beta/tan beta
1 answer
972 views
give an example of a metal/alkali mixture that produces hydrogen more vigorously than a zinc/acid mixture.
0 answers
495 views
why does first mosit litmus paper red and then make it lose colour?
1 answer
436 views
when carbon dioxide is passed into limewater, a white precipitate is formed. if carbon dioxide is passed continously into
0 answers
487 views
