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oksian1 [2.3K]
3 years ago
14

Give me an example of lustre that is shiny and dull.

Chemistry
1 answer:
Alex3 years ago
3 0
The state or quality of shining by reflecting light; glitter, sparkle, sheen, or gloss such as ornaments shiny and dull
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C, because a homogeneous mixture is evenly mixed.

All those others would be heterogeneous (not evenly mixed).
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3 years ago
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La suma de los números de masa de tres isótopos es 126 y la suma de los números de neutrones es 60. Hallar la configuración elec
irga5000 [103]
Ithe correct answer is B good luck
7 0
3 years ago
A certain electromagnetic wave a wavelength of 415 nm. What is the frequency of the wave in hz?
Kaylis [27]

Answer:

The frequency of the electromagnetic wave is 7.22891566 × 10¹⁴ Hz

Explanation:

The wavelength of the electromagnetic wave, λ = 415 nm

The speed of an electromagnetic wave, c ≈ 3.0 × 10⁸ m/s

Given that an electromagnetic wave is a periodic wave, we have;

The speed of the electromagnetic wave, c = f×λ

Where;

f = The frequency of the electromagnetic wave

Therefore, we have;

f = c/λ

From which we have;

f = (3.0 × 10⁸ m/s)/(415 nm) = 7.22891566 × 10¹⁴ /s = 7.22891566 × 10¹⁴ Hz

The frequency of the electromagnetic wave, f = 7.22891566 × 10¹⁴ Hz

8 0
3 years ago
Calculate the change in enthalpy for the following reaction, using the bond enthalpy data provided below. (Note: you may round t
aliina [53]

Answer:

-514 kJ/mol

Explanation:

The bond enthalpy which is also known as bond energy can be defined as the amount of energy needed to split one mole of the stated bond. The change in enthalpy of a given reaction can be estimated by subtracting the sum of the bond energies of the reactants from the sum of the bond energies of the products.

For the given chemical reaction, the change in enthalpy of the reaction is:

ΔH_{rxn} = [2(409) + 4(388) + 3(496) - 4(630) - 4(463)] kJ/mol = 818 + 1552 + 1488 - 2520 - 1852 = -514 kJ/mol

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3 years ago
Why is it important for scientists to form a consensus on scientific issues?
KATRIN_1 [288]

Answer:

It is important for scientists to form a consensus on scientific issues because scientific consensus tells us things that we have already learned.

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3 years ago
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