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3 years ago

What is rate a of reaction

1 answer:

4 0

The rate of the reaction is measurable quantity that refers to the amount or how much is are chemical substances reagents used up or converted into the product over some period of time.

Rate = change in the amount/time.

This can indirectly be observed through many ways, such as the volume of gas given off if the byproduct is a gas being produced, the colour of the solution etc.

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A 255 mL round--bonom flask is weighed and found to have a mass of 114.85 g. A few millimeters of an easily vaporized liquid are

Alex17521 [72]

Answer: Option (d) is the correct answer.

Explanation:

According to the given situation, mass of compound will be calculated as follows.

Mass of compound = mass of flask and condensed vapor - mass of flask

= 115.23 - 114.85

= 0.38 g

Volume (V) = 255 mL = $255 \times 10^{-6} m^{3}$ (as 1 ml = $10^{-6} m^{3}$ )

Pressure (P) = 101325 Pa

Temperature = $100^{o}C$ = (100 + 273) K = 373 K

Now, according to the ideal gas equation, PV = nRT

and, moles of compound n = $\frac{PV}{RT}$

= $\frac{101325 \times 255 \times 10^{-6}}{8.314 \times 373}$

= 0.008332 mol

As, molar mass of compound = $\frac{mass}{\text{no. of moles}}$

= $\frac{0.38}{0.008332}$

= 46 g/mol

Therefore, the compound is $C_{2}H_{5}OH$ (molar mass = 12 x 2 + 5 x 1 + 16 + 1 = 46 g/mol).

Thus, we can conclude that out of the given options the liquid could be $C_{2}H_{5}OH$ .

4 0

3 years ago

How many atoms in Alka-Seltzer

Salsk061 [2.6K]

Hope this helps solve your problem!

4 0

3 years ago

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Explain why chlorine is a gas while iodine is a solid yet both are halogens. Select one: a. Both iodine and chlorine differ in s

yarga [219]

Answer:

Chlorine has strong inter molecular forces than iodine

Explanation:

3 0

4 years ago

Read 2 more answers

HELP please quick HELP

stiks02 [169]

What do you need help with

4 0

3 years ago

A student compares the boiling point of substances having different intermolecular forces. which dependent variable did the stud

Gwar [14]

A student compares the boiling point of substances having different intermolecular forces. <u>Boiling points of various substances</u> is the dependent variable that student most likely use.

<h3>Does the nature of intermolecular forces present in different substance affect their boiling points?</h3>

The boiling point of a substance is proportional to the strength of its intermolecular forces, the higher the boiling point, the stronger the intermolecular forces. We can compare the strengths of intermolecular forces by comparing the boiling points of different substances.

<h3>What properties are affected by intermolecular forces?</h3>

Intermolecular forces are measured by boiling points.

Intermolecular forces increase as bond polarization increases.

Ionic > hydrogen bonding > dipole dipole > dispersion is the order of the strength of intermolecular forces (and thus their impact on boiling points).

<h3>How can you determine strong and weak intermolecular forces?</h3>

Substances with strong intermolecular forces are very attracted to one another and are held together tightly. These substances require a great deal of energy to separate, whereas substances with weak intermolecular forces are held together very loosely and have weak interactions.

Learn more about intermolecular forces:

<u><em>brainly.com/question/13479228</em></u>

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1 year ago