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3 years ago

11

The rate of dissolution is affected by all of the following except the A. agitation of solute within the solvent. B. surface are

a of the solute. C. temperature of the solute. D. amount of the solute dissolved.

1 answer:

laila [671]3 years ago

8 0

Answer:

B

Explanation:

cause surface area of solute is not necessary for solution

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Indica las condiciones que debe cumplir una colisión entre moléculas para que se produzca una reacción química

g100num [7]

Answer:

Las moléculas de los reactivos tienen que chocar entre sí. Estos choques deben de producirse con energía suficiente de forma que se puedan romper y formar enlaces químicos. En el choque debe haber una orientación adecuada para que los enlaces que se tienen que romper y formar estén a una distancia y posición viable.

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3 years ago

For an electron that interacts with visible light, which visible photon would give the most accurate (lowest error) measurement

Rom4ik [11]

Answer:

violet

Explanation:

When an electron interacts with visible light, energy is transferred from the photon to the electron.

The most accurate (lowest error) measurement of momentum (or speed) of an electron is obtained using a photon of high energy and low wavelength.

Violet light which lies at the high energy end of spectrum is most suitable.

4 0

3 years ago

A student prepares a aqueous solution of trimethylacetic acid . Calculate the fraction of trimethylacetic acid that is in the di

irinina [24]

The question is incomplete, here is the complete question:

A student prepares a 0.21 mM aqueous solution of trimethylacetic acid. Calculate the fraction of trimethylacetic acid that is in the dissociated form in his solution. Express your answer as a percentage. You will probably find some useful data in the ALEKS Data resource. Round your answer to 3 significant digits.

<u>Answer:</u> The percent of dissociation of trimethylacetic acid is 19.5 %

<u>Explanation:</u>

We are given:

Concentration of trimethylacetic acid = 0.21 mM = 0.00021 M (Conversion factor: 1 mole = 1000 millimoles )

The chemical equation for the dissociation of trimethylacetic acid follows:

$C_4H_9COOH\rightleftharpoons C_4H_9COO^-+H^+$

<u>Initial:</u> 0.00021

<u>At eqllm:</u> 0.00021-x x x

The expression of $K_a$ for above equation follows:

$K_a=\frac{[C_4H_9COO^-][H^+]}{[C_4H_9COOH]}$

We know that:

$K_a\text{ for }C_4H_9COOH=1\times 10^{-5}$

Putting values in above expression, we get:

$1\times 10^{-5}=\frac{x\times x}{(0.00021-x))}\\\\x=0.000041,-0.000051$

Neglecting the negative value of 'x' because concentration cannot be negative.

To calculate the fraction of dissociation, we use the equation:

$\text{Percent of dissociation}=\frac{[H^+]}{[C_4H_9COOH]}\times 100$

Putting values in above equation, we get:

$\text{Percent of dissociation}=\frac{0.000041}{0.00021}\times 100\\\\\text{Percent of dissociation of trimethylacetic acid}=19.5%$

Hence, the percent of dissociation of trimethylacetic acid is 19.5 %

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3 years ago

What mass of water vapor is produced from the gas phase reaction of O2 with H2 in a 2.5 L container at 28 °C if the partial pres

Bumek [7]

Answer:2.27 g H2O

Explanation:

Step 1. Get the limiting reagent

1.24 atm of H2 would react completely with 1.24 x (1/2) = 0.62 atm of O2, but there is more O2 present than that (0.98). O2 is in excess and H2 is the limiting reactant.

If the reaction goes to completion:

(1.24 atm H2) x (2 mol H2O / 2 mol H2) = 1.24 atm H2O vapor

n = PV / RT = (1.24 atm) x (2.5 L) / ((0.08205746 L atm/K mol) x (28 + 273)K) = 0.126 mol H2O

(0.126 mol H2O) x (18.01532 g H2O/mol) = 2.27 g H2O

3 0

3 years ago

Read 2 more answers

Can you give me an analogy on single replacement and double replacement

Alja [10]

Answer: Double Replacement

Explanation: When one of the elements in the compound is replaced by another element. In a single replacement reaction, Minnie Mouse leaves Mickey Mouse for Goofy. This happens when a compound is broken down into separate elements, or the opposite of synthesis.

It may seem a little silly but i hope it helps

7 0

2 years ago