Identify the components of sucrose

Sucrose is a disaccharide made of:

• $\alpha$-D-glucopyranose
• $\beta$-D-fructofuranose

linked through a glycosidic bond between:

• C$_1$ of glucose
• C$_2$ of fructose

Count chiral carbons in the glucose unit

In glucopyranose, the chiral carbons are: $C_1, C_2, C_3, C_4, C_5$

So, glucose contributes: $5 \text{ chiral carbons}$

Count chiral carbons in the fructose unit

In fructofuranose, the chiral carbons are: $C_2, C_3, C_4, C_5$

So, fructose contributes: $4 \text{ chiral carbons}$

Effect of glycosidic bond formation

The glycosidic bond forms between the two anomeric carbons, but these carbons remain stereogenic centers in the cyclic structure.

Therefore, total chiral carbons in sucrose are: $5 + 4 = 9$

Final answer

$\boxed{9}$

Comparison with stored correct answer

Stored correct answer = $9$

Our derived answer also = $9$

Hence, the answer agrees with the stored correct answer.