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lesya [120]
3 years ago
9

who arranged the elements according to atomic mass and used the arrangement to predict the properties of missing elements?

Chemistry
2 answers:
pogonyaev3 years ago
7 0
Dmitri Mendeleev arranged the elements
sesenic [268]3 years ago
3 0

Answer:

Dmitri Mendeleev

Explanation:

google :D

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The  mass  of NaN3  needed  to produce 17.2  L  nitrogen   at  STP is  calculated as  follows

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by cross  multiplication

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2NaN3 =2Na  +3 N2
by   use of  mole ratio  between NaN3  to N2  (2:3) the  moles  of NaN3  =  0.768  x2/3 =  0.512  moles  of NaN3

mass of NaN3  is therefore =moles of NaN3  xmolar  mass of NaN3

=0.512moles  x 65 g/mol =33.28 grams  of NaN3



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