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bekas [8.4K]
3 years ago
10

Complete the following vocabulary exercise relating to the level of structure in proteins. Match the words in the left-hand colu

mn with the appropriate blank in the sentences in the right-hand column.
1. Tertiary structure is achieved when a protein folds into a compact, three-dimensional shape stabilized by interactions between side-chain R groups of amino acids.
2. Quaternary structure is the result of two or more protein subunits assembling to form a larger, biologically active protein complex.
3. Primary structure is the sequence of amino acids in a protein.
4. Secondary structure describes the alpha-helices and beta-sheets that are formed by hydrogen bonding between backbone atoms located near each other in the polypeptide chain.
Chemistry
1 answer:
aliina [53]3 years ago
3 0

Answer:

Explanation:

dunno but your pretty smart

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When 0.49 g of a molecular compound was dissolved in 20.00 g of cyclohexane, the freezing point of the solution was lowered by 3
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Answer: The molecular mass of this compound is 131 g/mol

Explanation:

Depression in freezing point:

\Delta T_f=i\times k_f\times \frac{w_2\times 1000}{M_2\times w_1}

where,

\Delta T_f = depression in freezing point  = 3.9^oC

k_f = freezing point constant  = 20.8^0C/m

m = molality

i = Van't Hoff factor = 1 (for non-electrolyte)

w_2 = mass of solute = 0.49 g

w_1 = mass of solvent (cyclohexane) = 20.00 g

M_2 = molar mass of solute = ?

Now put all the given values in the above formula, we get:

(3.9)^oC=1\times (20.8^oC/m)\times \frac{(0.49g)\times 1000}{M_2\times (20.00g)}

M_2=131g/mol

Therefore, the molar mass of solute is 131 g/mol

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What would be the effect on this reaction of increasing the temperature?
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