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Relationship between moles and Avogadro's constant

Moles equation is moles= mass/RFM Avogadro's constant is 6.x 10 23 . 1 mole means 6x 10 23 atoms/molecules. e.g. 2 mole of Cu weighs 128g. What is the weight of 1 Cu atom? 2 moles is 2x 6x10 23 atoms = 1.2x1...
JJ
Answered by Joshny J. • Chemistry tutor
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Why is methylamine a stronger base than phenylamine?

Methylamine is CH 3 NH 2 , and phenylamine is C 6 H 5 NH 2 . In methylamine, the methyl group exerts a positive inductive effect on the nitrogen atom in the amine group. This means that electrons are "p...
MW
Answered by Matthew W. • Chemistry tutor
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electron arrangement in atoms

Work out what they know how are shells arranged? how do electrons arrange themselves within the shells? how many electrons per shell? types of shells how to write the arrangement long hand and short hand dra...
LN
Answered by Lucy N. • Chemistry tutor
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Calculate the mass of sodium amide needed to obtain 550 g of sodium azide, assuming there is a 95.0% yield of sodium azide. Give your answer to 3 significant figures.

2NaNH2 + N2O --> NaN3 + NaOH + NH3 Mr(NaN3) = 65 Mr(NaNH2) = 39 n(NaN3) = 550/65 = 8.46 100% NaN3 = 550/65 x 100/95 = 8.91 n(NaNH2) = 2 x 8.91 = 17.8 m(NaNH2) = 17.8 x Mr = 17.8 x 39 = 694.7 = 695 g
KM
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Determine whether a tertiary halogenoalkane will undergo a SN1 or SN2 reaction. Explain your choice.

Tertiary halogenoalkanes will undergo a SN1 reaction. This means that there is 1 molecule in the rate determining step, which is the slowest step. Because of the bulky alkyl groups surrounding the central ca...
GV
Answered by Ganesh V. • Chemistry tutor
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