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Question Number 189797    Answers: 0   Comments: 2

Question Number 178166    Answers: 1   Comments: 0

$$\mathrm{8}.\mathrm{5g}\:\mathrm{of}\:\mathrm{hydrated}\:\mathrm{copper}\:\left(\mathrm{ii}\right) \\ $$$$\mathrm{sulphate}\:\mathrm{CuSO}_{\mathrm{4}} .\mathrm{xH}_{\mathrm{2}} \mathrm{O}\:\mathrm{was}\:\mathrm{heated} \\ $$$$\mathrm{to}\:\mathrm{dryness}.\mathrm{if}\:\:\mathrm{4}.\mathrm{0g}\:\mathrm{of}\:\mathrm{anhydrous} \\ $$$$\mathrm{copper}\:\left(\mathrm{ii}\right)\:\mathrm{sulphate}\left[\mathrm{CuSO}_{\mathrm{4}} \right]\:\mathrm{obtain} \\ $$$$\mathrm{Find}\:\mathrm{number}\:\mathrm{of}\:\mathrm{molecule}\:\mathrm{of}\:\mathrm{water}\:\mathrm{of} \\ $$$$\mathrm{crystallization} \\ $$

Question Number 178165    Answers: 2   Comments: 0

$$\mathrm{2}.\mathrm{86g}\:\mathrm{of}\:\mathrm{hydrated}\:\mathrm{Sodium}\:\mathrm{carbonate} \\ $$$$\boldsymbol{\mathrm{Na}}_{\mathrm{2}} \boldsymbol{\mathrm{CO}}_{\mathrm{3}} .\boldsymbol{\mathrm{nH}}_{\mathrm{2}} \boldsymbol{\mathrm{O}}\:\mathrm{was}\:\mathrm{dissolved} \\ $$$$\mathrm{into}\:\mathrm{water}\:\mathrm{to}\:\mathrm{make}\:\mathrm{250cm}^{\mathrm{3}} \:\mathrm{solution} \\ $$$$\mathrm{of}\:\:\mathrm{0}.\mathrm{04M}\:\mathrm{Find}\:\mathrm{the}\:\mathrm{value}\:\mathrm{of}\:\mathrm{n} \\ $$

Question Number 152971    Answers: 0   Comments: 0

Question Number 136205    Answers: 0   Comments: 0

Question Number 112848    Answers: 0   Comments: 1

Question Number 69159    Answers: 0   Comments: 0

$${please}\:{help}\: \\ $$$$\:{A}\:\mathrm{7}.\mathrm{38}\:{g}\:{sample}\:{of}\:{magnesium}\:{sulfate}\:{MgSO}_{\mathrm{4}} .\:{X}\:{H}_{\mathrm{2}} {O}\:{lost}\:\mathrm{3}.\mathrm{78}{g}\:{of} \\ $$$${water}\:{on}\:{heating},\:{find}\:{the}\:{value}\:{of}\:{X}. \\ $$

Question Number 64078    Answers: 0   Comments: 3

Question Number 64077    Answers: 0   Comments: 0

Question Number 62923    Answers: 2   Comments: 0

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