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expeople1 [14]
3 years ago
11

Water molecules have a polarity, which allows them to be electrically attracted to other water molecules and other polar molecul

es by weak chemical bonds known as
Chemistry
2 answers:
scZoUnD [109]3 years ago
7 0
Hello there.

Water molecules have a polarity, which allows them to be electrically attracted to other water molecules and other polar molecules by weak chemical bonds known as
Hydrogen bonds
KATRIN_1 [288]3 years ago
5 0

Answer:   Hydrogen Bonds

Explanation:  Water molecules can be considered as the dipoles as it has having partial positive charge at one end that is on hydrogen and one end is having partial negative charge that is on oxygen.

Thus it has a tendency to show electrostatic forces of attraction towards the other molecules as well.

One water molecule can form 4 hydrogen bonds with 4 other molecule.

Thus these chemical bonds are known as Hydrogen bonds.

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3 years ago
of an unknown protein are dissolved in enough solvent to make 5.00mL of solution. The osmotic pressure of this solution is measu
krok68 [10]

The question is incomplete . The complete question is :

100 mg of an unknown protein are dissolved in enough solvent to make 5.00mL of solution. The osmotic pressure of this solution is measured to be 0.107atm at 25.0°C. Calculate the molar mass of the protein. Round your answer to 3 significant digits.

Answer:  The molar mass of the protein is 4.57\times 10^3g/mol

Explanation:

\pi =CRT

\pi=i\times \frac{\text{Mass of solute}\times 1000}{\text{Molar mass of solute}\times \text{Volume of solution (in mL)}}\times RT

where,

\pi = osmotic pressure of the solution = 0.107 atm

i = Van't hoff factor = 1 (for non-electrolytes)

Mass of solute (protein) = 100 mg = 0.1 g   (Conversion factor: 1 g = 1000 mg)

Volume of solution = 5.00 mL

R = Gas constant = 0.0821\text{ L.atm }mol^{-1}K^{-1}

T = temperature of the solution = 25^oC=[273+25]=298K

Putting values in above equation, we get:

0.107=1\times \frac{0.1\times 1000}{\text{Molar mass of insulin}\times 5.00}\times 0.0821\text{ Latm }mol^{-1}K^{-1}\times 298K\\\\\text{molar mass of protein}

\text{molar mass of protein}=4.57\times 10^3g/mol

Hence, the molar mass of the protein is 4.57\times 10^3g/mol

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3 years ago
What is the mass percentage of C in caffeine, C₈H₁₀N₄O₂? Provide an answer to two decimal places.
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Answer:

46.8% should be. correct, I'm not fully sure though. : )

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