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3 years ago

The relationship between molecular velocities and temperature is a _____ relationship.

1 answer:

6 0

The relationship between molecular velocities and temperature is a direct relationship. Basically their relationship is directly proportional

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Macie performs an experiment and finds evidence that does not agree with a theory. Is the evidence enough to change the theory?

alexira [117]

I would say that it is not enough evidence to change the theory because she has only done the experiment once and may have gotten something wrong. She will need to repeat her experiment at least 3 times her to see if she gets the same answers or i5 changes.

5 0

3 years ago

If you mixed 5.50 mL of the acidic solution with 6.79 mL of the basic solution, what should be the pH of the resulting solution?

Dima020 [189]

Answer : The pH of the resulting solution is 4.6

Explanation : Given,

$pK_a=4.757$

Activity coefficient for acetic acid = 1.000

Activity coefficient for acetate ion = 0.775

Ionic strength = 0.10 M

To calculate the pH of resulting solution we are using Henderson Hesselbach equation :

$pH=pK_a+\log \frac{[Salt]}{[Acid]}$

Now put all the given values in this expression, we get:

$pH=4.757+\log (\frac{0.775\times 0.10}{1.000\times 0.10})$

$pH=4.6$

Thus, the pH of the resulting solution is 4.6

7 0

3 years ago

For the reaction below, complete the rate expression that relates the change in concentration with respect to time to the rate o

Ann [662]

Answer: Rate in terms of disappearance of $NO$ = $-\frac{1d[NO]}{2dt}$

Rate in terms of disappearance of $Cl_2$ = $-\frac{1d[Cl_2]}{1dt}$

Rate in terms of appearance of $NOCl$ = $\frac{1d[NOCl]}{2dt}$

Explanation:

Rate law says that rate of a reaction is directly proportional to the concentration of the reactants each raised to a stoichiometric coefficient determined experimentally called as order.

$2NO+Cl_2\rightarrow 2NOCl$

The rate in terms of reactants is given as negative as the concentration of reactants is decreasing with time whereas the rate in terms of products is given as positive as the concentration of products is increasing with time.

Rate in terms of disappearance of = $-\frac{1d[NO]}{2dt}$

Rate in terms of disappearance of = $-\frac{1d[Cl_2]}{1dt}$

Rate in terms of appearance of $NOCl$ = $+\frac{1d[NOCl]}{2dt}$

5 0

3 years ago

1.883 Grams of copper reacted with excess sulfur to form an unknown Copper sulfide. The reaction creates 2.308 grams of an unkno

rosijanka [135]

Answer:

um it is most likely copper

Explanation:

8 0

3 years ago

A gas at constant volume has a pressure of 4. 50 atm at 200. K. What will be the pressure of the gas at 250. K? 3. 60 atm 4. 60

Trava [24]

5.625 atm will be the pressure of the gas at 250 K temperature of the gas at constant volume.

<h3>How we calculate the pressure of the gas?</h3>

Pressure of the gas will be calculated by using the ideal gas equation as:

PV = nRT,

From the question, it is clear that:

Moles of the gas and volume is constant here, so we calculate the pressure by rearranging the above equation as:

P/T = nR/V

And required equation will be:

P₁/T₁ = P₂/T₂, where

P₁ = pressure of gas = 4.50 atm

T₁ = temperature of gas = 200 K

P₂ = pressure of gas = to find?

T₂ = temperature of gas = 250 K

On putting all these values in the above equation, we get

P₂ = 4.50 × 250 / 200 = 5.625 atm

Hence, 5.625 atm is the pressure of the gas.

To know more about ideal gas equation, visit the below link:

brainly.com/question/1056445

5 0

3 years ago