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3 years ago

Why are coloures not observed in reflected light with light in the case of thick film?

Chemistry

1 answer:

Dovator [93]3 years ago

7 0

Answer:

Explanation:

Thick plates doesnt show interference pattern as the optical path difference is greater than coherency length. Hence no fringe formation takes place and colours don't segregate and hece all light is seen as white light.

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Upon combustion, a compound containing only carbon and hydrogen produces 2.67 g<img src="https://tex.z-dn.net/?f=CO_%7B2%7D" id=

Hoochie [10]

Answer:

$\boxed{\text{CH$_{2}$}}$

Explanation:

1. Calculate the mass of each element

$\text{Mass of C} = \text{2.67 g } \text{CO}_{2}\times \dfrac{\text{12.01 g C}}{\text{44.01 g }\text{CO}_{2}}= \text{0.7286 g C}\\\\\text{Mass of H} = \text{1.10 g }\text{H$_{2}$O}\times \dfrac{\text{2.016 g H}}{\text{18.02 g } \text{{H$_{2}$O}}} = \text{0.1231 g H}$

2. Calculate the moles of each element

$\text{Moles of C = 0.7286 g C}\times\dfrac{\text{1 mol C}}{\text{12.01 g C }} = \text{0.060 67 mol C}\\\\\text{Moles of H = 0.1231 g H} \times \dfrac{\text{1 mol H}}{\text{1.008 g H}} = \text{0.1221 mol H}$

3. Calculate the molar ratios

Divide all moles by the smallest number of moles.

$\text{C: } \dfrac{0.06067}{0.06067}= 1\\\\\text{H: } \dfrac{0.1221}{0.06067} = 2.015$

4. Round the ratios to the nearest integer

C:H = 1:2

5. Write the empirical formula

The empirical formula is $\boxed{\text{CH$_{2}$}}$

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4 years ago

Calculate the standard enthalpy of formation of carbon disulfide (CS2) from it's elements, given that C(graphite) + O2(g) → CO2(

ch4aika [34]

Answer:

Standard enthalpy of formation of Carbon disulfide CS2 = 87.3 KJ/mol

Explanation:

forming CS2 means that it should in the product side

C(graphite) + O2 → CO2 ΔH = -393.5

2S(rhombic) + 2O2 → 2SO2 ΔH = -296.4 x 2

CO2 + 2SO2 → CS2 + 3O2 ΔH = -1073.6 x -1

the second reaction is multiplied by 2 so that the SO2 and O2 can cancel out.

the third reaction is reversed (multiplied by -1) so that CS2 will be on the product side.

after adding the reaction and cancelling out similarities, the final reaction is: C(graphite) + 2S(rhombic) → CS2

Add ΔH to find the enthalpy of formation of CS2

ΔHf = (-393.5) + (-296.4 x 2) + (-1073.6 x -1) = 87.3 KJ/mol

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3 years ago

Explain why there would be many more plants in an ecosystem than ape-x consumers. I NEED THIS PLS

dsp73

Answer:

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3 years ago

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Match the term with the definition.

Tom [10]

Condensation goes with A.

Evaporation goes with C.

Sublimation goes with B.

Freezing goes with D.

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3 years ago

Balance these equations :

vfiekz [6]

Answer:

H2+O2_____2H20
2/8 S8_____2S8O3
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3 years ago

Why are coloures not observed in reflected light with light in the case of thick film?​

Why are coloures not observed in reflected light with light in the case of thick film?