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An 80-proof brandy is a 40.% (v/v) ethanol solution. The 'proof' is twice the percent concentration of alcohol in the beverage. How many milliliters of alcohol are present in 750mL of brandy? (9.4)
9. Solutions
Percent Concentrations
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What is the mass/volume percent concentration of the following solutions:0.075 mol sucrose (C12H22O11) in 270 mL of solution.
A
5.0 m/v %
B
2.8 m/v %
C
6.7 m/v %
D
9.5 m/v %
Verified step by step guidance1
Step 1: Understand the concept of mass/volume percent concentration, which is defined as the mass of solute divided by the volume of solution, multiplied by 100 to get a percentage.
Step 2: Calculate the molar mass of sucrose (C12H22O11). Add the atomic masses of all atoms in the formula: 12 carbon atoms, 22 hydrogen atoms, and 11 oxygen atoms.
Step 3: Convert moles of sucrose to grams using the molar mass calculated in Step 2. Use the formula: mass (g) = moles × molar mass (g/mol).
Step 4: Calculate the mass/volume percent concentration using the formula: (mass of sucrose in grams / volume of solution in mL) × 100.
Step 5: Compare the calculated mass/volume percent concentration with the given options to determine the correct answer.
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