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EastWind [94]
2 years ago
15

Jim brings his finger near a metal doorknob and receives a shock what does this demonstrates

Chemistry
2 answers:
qwelly [4]2 years ago
5 0

Answer:

Static Electricity

Explanation:

Most likely, in the room, Jim was building up static electricity by friction with the floor, which he released upon contact with a metal object.

Serga [27]2 years ago
3 0
Answer : Static Electricity


Explanation : Jim was building a static electricity by friction which means he had contact wit metal
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A saturated solution is made by dissolving 0.327 g of a polypeptide (a substance formed by joining together in a chainlike fashi
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Explanation:

To calculate the concentration of solute, we use the equation for osmotic pressure, which is:

\pi=iMRT

Or,

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

where,

\pi = osmotic pressure of the solution = 4.19 torr

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

Mass of solute (polypeptide) = 0.327 g

Volume of solution = 1.70 L

R = Gas constant = 62.364\text{ L.torr }mol^{-1}K^{-1}

T = temperature of the solution = 26^oC=[273+26]K=299K

Putting values in above equation, we get:

4.19torr=1\times \frac{0.327}{\text{Molar mass of solute}\times 1.70}\times 62.364\text{ L.mmHg }mol^{-1}K^{-1}\times 299K\\\\\text{molar mass of solute}=856g/mol

Hence, the molar mass of the polypeptide is 856 g/mol

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