a.write a balanced chemical equation for the complete combustion of sucrose.

--- this part of the question i got help on, and thank you

b. if combustion is complete, a brown liquid caramel might form, followed by a brown/black solid. what would be the major component of the solid?

Carbon

yay i was right, thank you very much for your help

To determine the major component of the solid formed during the complete combustion of sucrose, we need to understand the products of the combustion reaction.

In the complete combustion of sucrose (C12H22O11), the reactant combines with oxygen (O2) to produce carbon dioxide (CO2) and water (H2O) as the main products. The balanced chemical equation for the complete combustion of sucrose can be written as:

C12H22O11 + 12 O2 → 12 CO2 + 11 H2O

However, if a brown liquid caramel forms, it indicates that some of the carbon-containing compounds in sucrose did not completely burn to form carbon dioxide. Instead, they underwent incomplete combustion to form caramel, which is a brown liquid.

Furthermore, if a brown/black solid is formed after the caramel, it suggests that some of the carbon compounds in the caramel further decomposed or underwent reactions to form a solid carbonaceous material called "char" or "carbon black." This solid consists mainly of carbon.

Therefore, the major component of the solid formed would be carbon (C).