Use your calculated value for the percent composition of total protein in skim milk to calculate the mass of protein that would be present in one serving size (1 cup, 240 ml) of skim milk.
15.6% percent composition
Is that 15.6% w/w or w/v? I will assume w/v.
15.6 % (w/v) means 15.6 g protein/100 mL.
So in 240 mL you will have
15.6 g protein x (240/100) = ? g protein.
based on the mass of lactose that you isolate from 1 mL of skim milk, calculate the percent composition of lactose in skim milk.
mass of lactose= 0.28 grams
To calculate the mass of protein in one serving size of skim milk, we need to know the total mass of skim milk in one serving size.
To find the answer, we'll follow these steps:
Step 1: Determine the total mass of skim milk in one serving size.
Step 2: Calculate the mass of protein in one serving size using the percent composition.
Let's start with Step 1:
Step 1: Determine the total mass of skim milk in one serving size.
One serving size of skim milk is 240 ml. However, we need to convert this volume to mass using the density of skim milk. The density of skim milk is approximately 1 g/ml.
Mass of skim milk = Volume of skim milk × Density of skim milk
Mass of skim milk = 240 ml × 1 g/ml
Mass of skim milk = 240 g
Now, let's move to Step 2:
Step 2: Calculate the mass of protein in one serving size using the percent composition.
The percent composition of protein in skim milk is given as 15.6%.
Mass of protein = Percent composition of protein/100 × Mass of skim milk
Mass of protein = 15.6/100 × 240 g
Mass of protein = 0.156 × 240 g
Mass of protein = 37.44 g
Therefore, the mass of protein in one serving size (1 cup, 240 ml) of skim milk would be approximately 37.44 grams.