1)Buttermilk has 9 grams of protein and 12 grams of carbohydrate per cup (237ml). Estimate the concentration in mol/L of protein using the fact that the average protein is 300 amino acids long and the average amino acid has a mass of 110 amu.
2)Lactose (MW:342 amu) makes up the vast majority of the carbohydrate. Calculate the molarity of lactose in buttermilk and compare it to that of protein.
#2 is the same as #1
just it is 12 g
and it is molar mass of 342
so it will be 0.148
do you have to convert the 9grams to liters in order to answer the first question for the protein amount? i
The answer is 0.148.
I got the answer wrong with above,andthey told me this was.
1. avg molar mass = 110 x 399 = 33,000.
mols protein = grams/molar mass. You know grams and molar mass, solve for mols.
M = mols/L. You know mols and L, solve for M.
2. See #1.
.001151
I .001151 correct? I ended up with 2.72
1.15
Thank you!!
1) 6.52 *10^20 (Trust me on this one)
2) No idea :(
To estimate the concentration of protein in mol/L, we need to convert the mass of protein per cup to moles of protein per liter. Here's how you can do it:
Step 1: Calculate the mass of protein per cup in grams.
In this case, there are 9 grams of protein in 1 cup.
Step 2: Convert the mass of protein to moles.
To convert grams to moles, we need to divide the mass of protein by its molar mass. To find the molar mass of protein, we need to know the mass of a single amino acid. Given that the average amino acid has a mass of 110 amu, we can use it to estimate the molar mass of protein. Since the average protein is 300 amino acids long, the molar mass of protein is approximately 110 amu * 300 amino acids.
Molar mass of protein = 110 amu * 300 amino acids
Step 3: Convert the mass of protein per cup to moles of protein per liter.
Since there are 237 ml (or 0.237 L) in a cup, we need to divide the mass of protein by the volume in liters.
Moles of protein per liter = (mass of protein per cup / molar mass of protein) * (1 cup / 0.237 L)
Now you can substitute the given values:
Moles of protein per liter = (9 grams / (110 amu * 300 amino acids)) * (1 cup / 0.237 L)
Once you perform the calculations, you will obtain the estimated concentration of protein in mol/L.
To calculate the molarity of lactose in buttermilk, we can follow a similar approach:
Step 1: Calculate the mass of lactose per cup in grams.
In this case, we need to determine the amount of lactose in 1 cup of buttermilk. The given information states that lactose makes up the majority of the carbohydrate, but does not specify the exact proportion. Therefore, let's assume it makes up all the carbohydrate content.
Given that there are 12 grams of carbohydrate per cup and lactose is the major component, we can assume 12 grams of lactose per cup.
Step 2: Convert the mass of lactose to moles.
To convert grams to moles, we need to divide the mass of lactose by its molar mass, which is given as 342 amu.
Moles of lactose per liter = (mass of lactose per cup / molar mass of lactose) * (1 cup / 0.237 L)
Now, substitute the given values:
Moles of lactose per liter = (12 grams / 342 amu) * (1 cup / 0.237 L)
Once again, perform the calculations to determine the molarity of lactose in mol/L.
Now, you can compare the molarity of protein and lactose to see which one is higher in buttermilk.