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3 years ago

13

Which is a pure substance?

1 answer:

aliya0001 [1]3 years ago

5 0

Which is a pure substance?

<u>A faceted diamond.</u>

<u></u>

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As the frequency of electromagnetic waves increases, what happens to the wavelength?

Mnenie [13.5K]

Answer:

It increases.

When the frequency of electromagnetic waves increases, the wavelengths also increase because the frequency sends power to the wavelengths.

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3 years ago

Read 2 more answers

What is the temperature if 2L of 3moles HCl react with 2atm?

swat32

Answer:

$T=16K=-256.8\°C$

Explanation:

Hello!

In this case, according to the gas laws, we would be able to assume HCl can be modeled as an ideal gas for this calculation purpose; in such a way, we use the following equation to compute the temperature:

$PV=nRT\\\\T=\frac{PV}{nR}$

In such a way, we plug in moles, volume and pressure to obtain:

$T=\frac{2atm*2L}{3mol*0.08206\frac{atm*L}{mol*K}}\\\\T=16K=-256.8\°C$

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8 0

3 years ago

A student developed a chromatogram and found that the cluent front traveled 94 mm and the Zn²+ cation traveled

Valentin [98]

Answer:

srry i can't answer that

Explanation:

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1 year ago

The rate constant for the second-order reaction !s 0. 54 m-1 s-1 at 300°c. how long (in seconds) would 1t take for the concentra

Jlenok [28]

The answer is 3.63. seconds.

Second order reaction is the reaction in which the rate of reaction depends on either the concentration of two reactant species or on the two times the concentration of single reactant species.

What is the integrated rate law for the second-order reaction?

The integrated rate law that relates the concentration, time and rate constant for the second-order reaction is:

$\frac{1}{[A]} =\frac{1}{[A]_{0} } +kt$

Where

$\begin{array}{l}{\rm{[A] - concentration\ of\ reactant\ A\ at\ time\ t}}\\{{\rm{[A]}}_0}{\rm{ - initial\ concentration\ of\ reactant\ A}}\\{\rm{t - time}}\\{\rm{k - rate\ constant}}\end{array}$

Now, in the given question,

k = $0.54 m^{-1}. s^{-1}$

$[NO_{2} ]= 0.62\ M$

$[NO_{2} ]_{0} = 0.28\ M$

Thus, using the rate law, the time is calculated as-

$\frac{1}{0.28\ M} =\frac{1}{0.62\ M } +(0.54 m^{-1}.s^{-1}) t\\\\(0.54 m^{-1}.s^{-1}) t= \frac{1}{0.28\ M} -\frac{1}{0.62\ M } = 1.959 \\\\$

Therefore,

$t =\frac{1.959}{0.54} = 3.63\ seconds$

Hence, the it would take 3.63 seconds for the concentration of $NO_{2}$ to decrease from 0.62 M to 0.28 M if the reaction is second order.

To learn more about second order reaction visit:

brainly.com/question/17217385

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3 0

2 years ago

3. Give an example of how carbon is transferred frem being in a living to a non-living<br> organism.

slavikrds [6]

Answer:

Carbon moves from living things to the atmosphere. Each time you exhale, you are releasing carbon dioxide gas (CO2) into the atmosphere. Animals and plants need to get rid of carbon dioxide gas through a process called respiration. Carbon moves from fossil fuels to the atmosphere when fuels are burned.

4 0

3 years ago