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Lena [83]
2 years ago
10

Which opinion would be an example of an alloy brass or silver or gold or copper

Chemistry
1 answer:
frutty [35]2 years ago
8 0

Answer:

Gold and copper are example of alloy

Explanation:

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Which basic property of a single water molecule accounts for all of its special features, including adhesion and cohesion, its a
svetlana [45]
The property is its polarity (or hydrogen bonds)
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If a sample has 25% parent and 75% daughter, how many halflifes have gone by?
Anit [1.1K]

Answer:

Two half lives.

Explanation:

It is known that the decay of isotopes and radioactive material obeys first order kinetics.

Also, it is clear that in first order decay the half-life time is independent of the initial concentration.

That means for a sample 100% to decay to 50 % it will take one half-life, and to decay the remaining 50% to 25% it will take another half-life.

So, for a sample has 25% parent and 75% daughter it will have two half-lives.

6 0
3 years ago
A radio station has a frequency of 9.09 x 107 Hz. What is the energy of the radio waves the station emits from its radio tower?
TEA [102]

Answer:

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Explanation:

5 0
3 years ago
A 200. 0-ng sample of sodium-24 was stored in a lead-lined cabinet for 45 hours. The half-life of sodium-24 is 15 hours. How muc
ipn [44]

Answer:

25 gm would be left

Explanation:

45 hours is 3 half lives

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