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zaharov [31]
2 years ago
10

What type of wave is represented in the diagram?

Chemistry
2 answers:
Ratling [72]2 years ago
8 0
C longitudal

Explanation: It looks more like a longitudal wave than anything else
meriva2 years ago
4 0

Answer:

b

Explanation:

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If 12.5 grams of the original sample of cesium-137 remained after 90.6 years, what was the mass of the original sample?
myrzilka [38]

Answer:

Mass of original sample = 100 g

Explanation:

Half life of cesium-137 = 30.17 years

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k=\frac{\ln2}{30.17}\ year^{-1}

The rate constant, k = 0.02297 year⁻¹

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Using integrated rate law for first order kinetics as:

[A_t]=[A_0]e^{-kt}

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Final concentration [A_t] = 12.5 grams

Applying in the above equation, we get that:-

12.5\ g=[A_0]e^{-0.02297\times 90.6}

[A_0]=\frac{12.5}{e^{-0.02297\times 90.6}}\ g=100\ g

<u>Mass of original sample = 100 g</u>

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2 years ago
When is a covalent bond described as polar? Choose one: when electrons are transferred from one atom to another if covalently bo
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Because positive and negative charges are separated at the bond, molecules with polar covalent bonds interact with the dipoles of other molecules. This produces intermolecular dipole-dipole forces between the molecules.

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