wiz-icon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

Calculate the no. of atoms of Au in 1 gm of Au. No. of molecule of H2O in a drop of H2O weighting 0.05 gm, (Atomic mass of Au is 197).

Open in App
Solution

a) Gram atomic mass of Au=197g
197 g Au contains =6022×1023 atoms
1 gm of Au contains =6022×1023197=306×1023 atoms
b) molecule mass of water = 18 g
no of molecules in 0.05 g of water =0.0518=278×103 molecules
one molecule =6023×1022 atoms/ molecules.
2.78×103 molecules of water contains =(278×103)
(6023×1023)
=1.67×1021 molecules

1153630_1041372_ans_46d41a44892b442691004f1e79eb8dbd.JPG

flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Percentage Composition and Molecular Formula
CHEMISTRY
Watch in App
Join BYJU'S Learning Program
CrossIcon