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4 years ago

Which of the mechanical waves below has the greatest energy?

Chemistry

1 answer:

Volgvan4 years ago

3 0

Answer:

Blue wave.

Explanation:

The energy of a wave depends on its amplitude. A wave having more amplitude will have greatest energy while a wave having small amplitude will have least energy.
The given figure shows four waves that are shown with green, orange, blue and red color.
It is very clear from the figure that the amplitude of blue wave is greatest of all the wave.
Hence, blue wave will have greatest energy.

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Diamonds and graphite are both made of carbon atoms. Why do they have different properties?

AysviL [449]

Answer: Graphite and Diamond are different because they have different structures. Both have Giant Covalent Structures resulting in very high melting temperatures.
Explanation: each carbon atom in Diamond has 4 covalent bonds with other Carbons, making it extremely strong and hard.

6 0

3 years ago

CADMIUM SOLUBILITY AND pH Cadmium is a toxic metal. It can be removed from water by chemical precipitation of solid cadmium hydr

Serga [27]

Explanation:

It is known that,

Molar mass of Cd = 112.41 g/mol

Standard concentration of Cd = 0.005 mg/L = $0.005 \times 10^{-3}$ g/L

Hence, we will calculate the molarity as follows.

Molarity = $\frac{0.005 \times 10^{-3}}{112.41} mol/L$

= $4.45 \times 10^{-8}$ M

Equation for the reaction is as follows.

$Cd(OH)_{2} \rightleftharpoons Cd^{2+} + 2OH^{-}$

$K_{sp} = [Cd^{2+}][OH^{-}]^{2}]$

$2 \times 10^{-34} = 4.45 \times 10^{-8} \times [OH^{-}]^{2}$

$[OH^{-}] = 6.7 \times 10^{-4}$ M

Also,

$[H^{+}] = \frac{10^{-14}}{[OH^{-}]}$

= $\frac{10^{-14}}{6.7 \times 10^{-4}}$

= $1.49 \times 10^{-11} M$

Relation between pH and concentration of hydrogen ions is as follows.

pH = $-log [H^{+}]$

= $-log (1.49 \times 10^{-11} M)$

= 10.82

Thus, we can conclude that a minimum pH of 10.82 is necessary to reduce the dissolved cadmium ion concentration to the standard.

4 0

3 years ago

At what temperature will 41.6 grams of nitrogen gas (N2) exert a pressure of 1 point

klio [65]

Answer:

The temp is 176k

Explanation:

7 0

3 years ago

Calculate Delta n (change in moles of gaseous substances) for each of the following balanced chemical equations...

Lerok [7]

2C6H6O(l)+17O2−−>12CO2(g)+12H2O(l)
2SO2(g)+O2(g)−−>2SO3(g)
N2(g)+O2(g)−−>2NO(g)
2Na(s)+Br2(l)−−>2NaBr(s)
On the 1st 3 I have
12 -17 = -5
2 - 3 = -1
2 - 2 = 0
For the last one:
Delta n=0

3 0

3 years ago

In which of these samples do the molecules most likely have the most kinetic energy?

hichkok12 [17]

Answer:

water vapor

Explanation:

8 0

3 years ago