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3 years ago

In 2.23x10^24 atoms of k2co3

Chemistry

1 answer:

xeze [42]3 years ago

4 0

Answer:use a calculator

Explanation:

It helps

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400. mg of an unknown protein are dissolved in enough solvent to make 5.00 mL of solution. The osmotic pressure of this solution

ch4aika [34]

Answer: The molecular weight of protein is $1.14\times 10^2g/mol$

Explanation:

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

$\pi=iMRT$

or,

$\pi=i\times \frac{m_{solute}\times 1000}{M_{solute}\times V_{solution}\text{ (in mL)}}}\times RT$

where,

$\pi$ = Osmotic pressure of the solution = 0.0861 atm

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

$m_{solute}$ = mass of protein = 400 mg = 0.4 g (Conversion factor: 1 g = 1000 mg)

$M_{solute}$ = molar mass of protein = ?

$V_{solution}$ = Volume of solution = 5.00 mL

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

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

Putting values in above equation, we get:

$0.0861atm=1\times \frac{0.4g\times 1000}{M\times 100}\times 0.0821\text{ L. atm }mol^{-1}K^{-1}\times 298K\\\\M=1136.62g/mol=1.14\times 10^2g/mol$

Hence, the molecular weight of protein is $1.14\times 10^2g/mol$

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3 years ago

True or false daltons atomic theory stated that matter is mostly empty space

Bas_tet [7]

The answer is false. Because Daltons theory stated that the Atom was a solid ball.

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What is the molar mass of Fe2Br3?

aleksklad [387]

351.4020 g/mol which is 3.51 x 10∧ 2 g/mole

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What is the name of SbBr3

gayaneshka [121]

Antimony Tribromide is the answer

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Normal human body temperature is 37 degrees Celsius. This temperature is equivalent to?

Lelu [443]

This temperature is equivalent to 98.6 degrees Fahrenheit

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