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ICSE Class 10 Answered

What weight of sodium sulphate contains the same no.of atoms as there are present in 777g of calcium chloride?
Asked by nisha_vini29 | 17 Nov, 2017, 12:32: PM
answered-by-expert Expert Answer
No. space of space moles equals 777 over 111 space space space space space space space space space space space space space space space space space space space equals 7 space moles 1 space mole space of space substance space contains space 6.022 cross times 10 to the power of 23 space atoms therefore 7 cross times space 6.022 cross times 10 to the power of 23 equals 4.2 cross times 10 to the power of 24 As space one space CaCl subscript 2 space unit space contains space 3 space atoms space per space molcule space comma 4.2 cross times 10 to the power of 24 cross times 3 equals 1.26 cross times 10 to the power of 25 space atoms
Answered by Varsha | 17 Nov, 2017, 02:48: PM

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