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3 years ago

Which of the following is true about the frequencies of electromagnetic radiation

Chemistry

1 answer:

Semmy [17]3 years ago

3 0

<h2>Answer:Ultraviolet waves have higher frequencies than radio waves.</h2>

Explanation:

The waves arranged in increasing order of frequency are radio waves,infrared waves,x-rays,ultraviolet waves.

Option A:

Ultraviolet waves have higher frequencies than radio waves.This agrees with the above order.

Option B:

X-rays have lower frequencies than infrared waves.This does not agree with the above order.

Option C:

Radio waves have higher frequency than x-rays.This does not agree with the above order.

Option D:

Gamma rays have lower frequencies than ultraviolet waves.This does not agree with the above order.

So,option A is correct.

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The absorbance of an equilibrium mixture containing FeSCN2 was measured at 447 nm and found to be 0.347. What is the equilibrium

Ksenya-84 [330]

Answer:

The concentration is $C = 1.11 mol/L$

Explanation:

From the question we are told that

The absorbance is $A = 0.347$

The length is $l = 447 nm = 447 *10^{-7} \ cm$

Generally absorbance is mathematically represented as

$A = \epsilon* C * l$

where $\epsilon$ is the molar absorptivity of FeSCN2 with a value $\epsilon = 7.0*10^3 L/cm/mol$

and $C$ is the equilibrium concentration of FeSCN2

$C = \frac{A}{\epsilon * l }$

substituting values

$C = \frac{0.347}{7.0*10^{3} * 447 *10^{-7} }$

$C = 1.11 mol/L$

5 0

2 years ago

16. Two identical beakers containing water, which have not yet been placed in the sun, are shown below. х Y If both beakers are

Tamiku [17]

None sorry I can’t I 8558993

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2 years ago

Approximately how many elements combine in different ways to make compounds?

Vlada [557]

Mos commonly 2 elements combine.

examples: H2, O2

8 0

2 years ago

Read 2 more answers

Science does not include beliefs or opinions theories laws conclusions

denpristay [2]

Beliefs or opinions

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3 years ago

When water vapor changes to a liquid what is it called

Mademuasel [1]

Answer:

$hello \: your \: answer \: is \: here.$

Explanation:

<h2>Condensation is the change of water from its gaseous form (water vapor) into liquid water. Condensation generally occurs in the atmosphere when warm air rises, cools and looses its capacity to hold water vapor. As a result, excess water vapor condenses to form cloud droplets.</h2>

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5 0

2 years ago