During chemistry lab, maria places sucrose in a glass beaker, adds water, and stirs. as the table sugar disappears, she loudly proclaims that she has chemically broken down the sucrose into fructose and glucose. is maria's chemical analysis correct? why or why not?

Answer is:  Maria's chemical analysis is not correct.

Sucrose is only dissolved in water, there are still sucrose molecules in solution, not molecules of fructose and glucose. For breaking bonds in molecule of sucrose enzymes are needed.

Solution is homogeneous mixture composed of two or more substances.  

In aqueous solution, solvent is water and solute (in this example sucrose) is a substance dissolved in water.  

Homogeneous solution of sugar and water can be separated with heating (evaporating the water).

2fe + 3h2so4 -> fe2(so4)3 + 3h2

it is necessary to balance equations in order to get the proper amount of reactants as well as products in order not to make a miscalculation.

you cannot change the subscripts as that would change the substance itself. for instance, diatomic elements such as h2 only have the subscript two when a gas. another example would be so4, if you were to change the subscript, the element would no longer be sulfate.

we change the coefficients instead as that only changes the number of molecules rather than the substance itself.

hope this !