A sample of a
compound contain's 9.75 gm
Zn, 9X10*22 atoms of Cr
and 0.6 gm atoms
of O. What is empirical
formula of compound?
Answers
Answer:
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Explanation:
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Answer:
2 Answers
Rohit Kodag
Rohit Kodag
Answered Jul 3 2018 · Author has 98 answers and 170.4k answer views
1] Let assume number of moles of Cr as X
1 mol = 6.022×10^23 atoms
x = 1.8×10^23
X = 1.8×10^23/6.022×10^23
X = 0.299 moles.
[ Mass = number of moles × molar mass
Number of moles = mass/molar mass]
2) number of 'O' moles = 0.6/16 = 0.0375
3) number of 'Zn' moles = 9.75/65 = 0.15
Divide all the numbers of moles with least number of moles to get simplest whole number ratio of atoms of all the elements present in a compound i.e
[If answer came like 0.25 , multiply least number which gives whole number i.e 0.2
Explanation: