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jekas [21]
1 year ago
6

Please answer urgent

Chemistry
1 answer:
erastova [34]1 year ago
4 0

The wavelength of a wave refers to the horizontal distance that is travelled by a wave.

<h3>What is wavelength?</h3>

The wavelength of a wave is given by the formula;

v =λf

f = v/λ

Substituting the values;

f = 3 * 10^8 m/s/410 * 10^-9 m

f = 7.3 * 10^14 Hz

for 2

f = 3 * 10^8 m/s/434 * 10^-9 m

f = 6.9  * 10^14 Hz

for 3

f = 3 * 10^8 m/s/486 * 10^-9 m

f = 6.2  * 10^14 Hz

for 4

f = 3 * 10^8 m/s/657 * 10^-9 m

f = 4.6 * 10^14 Hz

Learn more about wavelength:brainly.com/question/13533093

#SPJ1

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According to the below equation, how many moles of SO2 are required to generate 1.43×1024 water molecules?
podryga [215]
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Multiply everything on the top = 8.61x10^47
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3 0
3 years ago
There are two steps in the usual industrial preparation of acrylic acid, the immediate precursor of several useful plastics. In
adell [148]

Answer:

The net change in enthalpy for the formation of one mole of acrylic acid from calcium carbide, water and carbon dioxide is 523.2 kJ.

Explanation:

Step 1:

CaC_2(s) + 2H_2O(g)\rightarrow C_2H_2(g) + Ca(OH)_2(s),\Delta H_1=414.0 kJ...[1]

Step 2 :

6C_2H_2(g) + 3CO_2(g) + 4H_2O(g)\rightarrow 5CH_2CHCO_2H(g) \Delta H_2=132.0kJ..[2]

Adding 6 × [1] and [2]:

6CaC_2(s) + 12H_2O(g)\rightarrow 6C_2H_2(g) + 6Ca(OH)_2(s)

6C_2H_2(g)+3CO_2(g)+16H_2O(g)\rightarrow 5CH_2CHCO_2H(g)

we get :

6CaC_2(s) + 8H_2O(g)+3CO_2(g)\rightarrow 5CH_2CHCO_2H(g)+ 6Ca(OH)_2(s),\Delta H'=?

\Delta H'=6\times \Delta H_1+\Delta H_2

\Delta H'=6\times 414.0 kJ+132.0kJ

\Delta H'=2,626 kJ

Energy released on formation of 5 moles of acrylic acid = 2,626 kJ

Energy released on formation of 1 mole of acrylic acid:

\frac{ 2,626 kJ}{5 } = 523.2 kJ

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