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skad [1K]
2 years ago
14

In order to change the intensity of the light, you change the wavelength of the light.

Chemistry
1 answer:
Ivanshal [37]2 years ago
5 0

Answer:

False.................

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Coffee shops sell paper coffee<br> cups with cardboard sleeves<br> for customer safety. Why?
11111nata11111 [884]

The cardboard sleeves reduce the heatness from the coffee cup. So then the cosumer does not get a burn.

4 0
2 years ago
A fuel cell designed to react grain alcohol with oxygen has the following net reaction:
sertanlavr [38]

Answer:

b. E = 2,28V

Explanation:

The maximum work is the same than ΔG. As ΔG could be written as:

ΔG = nFE <em>(1)</em>

Where n is moles of electrons transferred, F is faraday constant (96485 J/Vmol) and E is the voltage of the cell.

For the reaction:

CH₃OH(l) + ³/₂O₂(g) → CO₂(g) + 2H₂O(l)

The oxidation state of C in CH₃OH is -2 but in CO₂ is +4, that means transferred electrons are +4 - -2 = <em>6e⁻</em>

Replacing in (1):

1320x10³ J = 6mol e⁻×96485J/Vmol×E

<em>E = 2,28V</em>

<em></em>

I hope it helps!

8 0
3 years ago
Jim measures how long it takes for a toy car to roll down a ramp. He rolls the car down the ramp four times in the exact same wa
Elina [12.6K]
A- the time is about the same for each roll.
4 0
3 years ago
What is the mass percent of a sugar solution when 489 grams of sugar is combined with 877 grams of water?​
natka813 [3]
The sugar solution was made by mixing 12 grams of water
4 0
2 years ago
How many moles of NO₂ would be required to produce 2.30 moles of HNO₃ in the presence of excess water in the following chemical
kow [346]

Answer:

Stoichiometric Calculation:

3 NO₂(g) + H₂O (l) → 2 HNO₃(g) + NO(g)

2 moles of HNO₃ is produced from 3 moles of NO₂.

Therefore, By unitary method:

2.30 moles of HNO₃ produced from the moles of NO₂ = \dfrac{3}{2} \times 2.30 = \bf{3.45 mol}

6 0
3 years ago
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