Answer:

Explanation:
1 mol of Pb(MnO₄)₂contains 1 mol of Pb atoms.
1. Moles of Pb

2. Atoms of Pb

Dehyrdration should happen to join two monosaccharide units into a dissacharide. It is used to build up molecules by losing some water moleculse in the process. In a dehydration synthesis reaction between two un-ionized monomers. Hope this answers the question. Have a nice day.
If we use 100 grams of compound:
m(C) = 0,7787 · 100 g = 77,87 g.
n(C) = 77,87 g ÷ 12 g/mol = 6,49 mol.
m(H) = 0,0263 · 100 g = 2,63 g.
n(H) = 2,63 g ÷ 1 g/mol = 2,63 mol.
m(O) = 0,5562 · 100 g = 55,62 g.
n(O) = 55,62 g ÷ 16 g/mol = 3,48 mol.
n(C) : n(H) : n(O) = 6,49 mol : 2,63 mol : 3,48 mol.
n(C) : n(H) : n(O) = 2,5 : 1 : 1,33.
From molecular mass only possible is C₁₂H₉O₁₂.
2 because it is the only one that contains Carbon and Hydrogen only