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Studentka2010 [4]
3 years ago
15

When parallel light rays exit a convex lens, they .

Chemistry
2 answers:
Alexxx [7]3 years ago
6 0
When the parallel light rays exit a convex lens, it comes away or diverge.
Vitek1552 [10]3 years ago
6 0

Converge

I took the assignment

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What type of reaction is the following reaction?<br> AgNO3+Na→ NaNO3 + Ag
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It takes 338. kJ/mom to break a carbon-chlorine single bond. Calculate the maximum wavelength of light for which a carbon-chlori
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The relation between energy and wavelength of light is given by Planck's equation, which is:

E=\frac{Nhc}{\lambda}

where,

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N= avogadro's number

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c = speed of light

\lambda = wavelength of light

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Answer:

d. 12.3 grams of Al2O3

Explanation:

Based on the reaction:

4Al + 3O2 → 2Al2O3

<em>Where 4 moles of Al reacts in excess of oxygen to produce 2 moles of aluminium oxide.</em>

<em />

To solve this question we must find the moles of Aluminium. With these moles we can find the moles of aluminium oxide using the reaction:

<em>Moles Al -Molar mass: 26.9815g/mol-</em>

6.50g * (1mol / 26.9815g) = 0.241 moles Al

<em>Mass Al₂O₃ -Molar mass: 101.96g/mol-</em>

0.241 moles Al * (2 mol Al2O3 / 4 mol Al) = 0.120 moles Al2O3

0.120 moles Al2O3 * (101.96g / mol) =

12.3g of Al2O3 are produced.

Right answer is:

<h3>d. 12.3 grams of Al2O3 </h3>

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