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3 years ago

Please help!!! Will give brainlist

Chemistry

1 answer:

evablogger [386]3 years ago

3 0

RNA associates with a set of proteins to form ribosomes. These complex structures, which physically move along an mRNA molecule, catalyze the assembly of amino acids into protein chains. They also bind tRNAs and various accessory molecules necessary for protein synthesis.

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The vapor pressure of water is 23.76 mm Hg at 25 °C. A nonvolatile, nonelectrolyte that dissolves in water is sucrose. Calculate

MrRissso [65]

Answer : The vapor pressure of solution is 23.67 mmHg.

Solution:

As the relative lowering of vapor pressure is directly proportional to the amount of dissolved solute.

The formula for relative lowering of vapor pressure will be,

$\frac{p^o-p_s}{p^o}=\frac{w_2M_1}{w_1M_2}$

where,

$p^o$ = vapor pressure of pure solvent (water) = 23.76 mmHg

$p_s$ = vapor pressure of solution= ?

$w_2$ = mass of solute (sucrose) = 12.25 g

$w_1$ = mass of solvent (water) = 176.3 g

$M_1$ = molar mass of solvent (water) = 18.02 g/mole

$M_2$ = molar mass of solute (sucrose) = 342.3 g/mole

Now put all the given values in this formula ,we get the vapor pressure of the solution.

$\frac{23.76-p_s}{23.76}=\frac{12.25\times 18.02}{176.3\times 342.3}$

$p_s=23.67mmHg$

Therefore, the vapor pressure of solution is 23.67 mmHg.

7 0

3 years ago

Four friends wrote down descriptions of snow and sleet.

4vir4ik [10]

Answer:

Hi there! After reading each of these descriptions of snow and sleet, I believe that Brad's description is the most accurate and complete. Alanna seems to be describing snow and hail, Candace has not provided an accurate description of snow, and Jim's description is completely inaccurate. Brad provides the best description.

I hope this helps you! Take care and have a great day - Mani :)

3 0

3 years ago

In which of the following cases would recrystallization be favored over extraction when purifying a mixture of two solid compoun

777dan777 [17]

Answer:

B. II.

Explanation:

The idea of recrystallization works when the solubility of the target substance decreases as the temperature of the solution decreases.

The method of recrystallization involves dissolving the solute in a suitable hot solvent and then allow the solution to cool gradually. The pure solute dissolves in the hot solvent and then separates out of the solution as it is cooled to room temperature.

Hence recrystallization is preferred over solvent extraction when the desired compound is poorly soluble in the solvent pair at low temperatures and greatly soluble in the solvent pair at high temperatures.

8 0

3 years ago

which of the following represents a compound? a. cl2 b. n2 c. co2 d. h2 user: which of the following represents an element? a.co

babunello [35]

C. CO2 is the compound (carbon dioxide) while N2 is the element (nitrogen)

6 0

4 years ago

What does the lines making a circle around the high-pressure area indicate? A. An occluded front B. Areas of equal altitude C. A

levacccp [35]

The answer is; C

These lines that join areas of equal pressure during an air system are called isobars. The black lines in the diagram below are the isobars. They are good indicators of the strength of these systems. The innermost closed lines indicate the positions of relative maxima (high-pressure areas) and minima (low-pressure areas) in the pressure field.

4 0

4 years ago

Read 2 more answers