How many hybrid orbitals do we use to describe each molecule c2h5no (4 c−h bonds and one o−h) key?

The hybrid orbitals involved are sp3 and sp2 hybrid orbitals.

Hybrid orbitals are orbitals obtained by combining atomic orbitals to give hybrid orbitals of appropriate energy that can take part in bond formation. The number of atomic orbitals combined is equal to the number of hybrid orbitals obtained after combination.

In C2H5NO having 4 C- H and one O - H bond, the hybrid orbitals involved are sp3 and sp2 hybrid orbitals. The sp3 hybrid orbitals occur in single bonds while the sp2 orbitals occur in double bonds. The structure of the molecule is shown in the image attached to this answer.

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Explanation:

a. the law of proportion states the combination of 2 atoms in a specific ratio to produce multiple compounds such as the given statement of question ‘1st compound contains 88.8 % cu ’ indicates 88.8 g of cu is present along with 11.2 g oxygen in 100 g of compound whereas the statement ‘2st compound contains 79.9 % cu ’ indicates 79.9 g of cu is present along with 20.1 g oxygen in 100 g of compound

1st compound contains 88.8 g cu

for cu

m = 63 g /mol

atomic % = 88.8 /63 = 1.42

for o

m = 16 g /mol

atomic % = 11.2 /16 = 0.7

b. the emperical formula of 1st compound is

cu1.4o0.7

cu2o