Question

what is the formula mass (molar mass) of sucrose (c₁₂h₂₂o₁₁), table sugar?
○ 386 g/mol
○ 29 g/mol
○ 342 g/mol
○ 130 g/mol
question 15
1 pts
consider this hypothetical reaction: a + 4b —→ c + 3d. assume that the equation is balanced.
which mole ration will produce the most product?
○ a/4b
○ a/b
○ 4a/b
○ 3a/4b

Explanation:

Question 14

Step1: Calculate molar mass of each element

• Molar mass of \(C = 12\ g/mol\), for \(C_{12}\): \(12\times12 = 144\ g/mol\)
• Molar mass of \(H= 1\ g/mol\), for \(H_{22}\): \(1\times22 = 22\ g/mol\)
• Molar mass of \(O = 16\ g/mol\), for \(O_{11}\): \(16\times11 = 176\ g/mol\)

Step2: Sum up the molar masses

Total molar mass of \(C_{12}H_{22}O_{11}\): \(144 + 22+176=342\ g/mol\)

Step1: Analyze the stoichiometry of the reaction

From the balanced equation \(A + 4B
ightarrow C + 3D\), the mole ratio of \(A\) to \(B\) is \(1:4\) (i.e., \(A/4B\)). When the reactants are in the stoichiometric ratio, there is no limiting reactant (assuming no excess of either reactant beyond the ratio required by the balanced equation). If the ratio is different (e.g., \(A/B\) implies more \(A\) relative to \(B\) than the stoichiometric ratio, \(4A/B\) implies more \(A\) relative to \(B\) than the stoichiometric ratio, \(3A/4B\) also implies a non - stoichiometric ratio), one of the reactants will be a limiting reactant. The limiting reactant restricts the amount of product formed. When reactants are in the stoichiometric ratio (\(A/4B\)), both reactants are completely consumed (assuming no side - reactions) and the maximum amount of products (\(C\) and \(D\)) is formed according to the mole ratios in the balanced equation.

Answer:

\(342\ g/mol\)

Question 15