What is the mass of a sample f NH3 containing 6.3 x 10^23 molecules of NH3?
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198
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Ответ:
ok so u take 90-20 for the is where the miniscus is at and u get 70 then count the number of spaces between 70 and 80 and then take that and subtract 70 and 20 to get 50 and i think thats ur answer.
I HOPE THIS IS HELPFUL!!!