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Artist 52 [7]
3 years ago
6

Many extrusive volcanic rocks contain holes which have formed from

Chemistry
1 answer:
mario62 [17]3 years ago
6 0
Air bubbles, which make them porous 
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Isotonic compound have high melting point. Why ? Name the ions present in CaS.
yuradex [85]

Explanation:

Because a large amount of energy is required to break the strong inter-ionic attraction.

CaS => Ca2+ & S2-

3 0
3 years ago
Is phosphorous dissolving in carbon disulfide a physical or chemical property? if physical, is it intensive or extensive?
Nana76 [90]

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Explanation: Hope this helped! :)

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3 years ago
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2 years ago
Choose the phrase that best defines ecosystem service. (1 point)
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3 years ago
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As part of her nuclear stress test, Simone starts to walk on the treadmill. When she reaches the maximum level, Paul injects a r
Naya [18.7K]

Answer:

Part A: 36 MBq; Part B: 18 MBq

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The half-life is the time it takes for half the substance to disappear.

The activity decreases by half every half-life

A =Ao(½)^n, where n is the number of half-lives.

Part A

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Part B

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A = Ao(½)^2 = ¼ × 72 MBq = 18 MBq

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3 years ago
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