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iris [78.8K]
2 years ago
13

What is true about Carbon-14 and Carbon-12?

Chemistry
1 answer:
bogdanovich [222]2 years ago
6 0

Answer:

<u>B.</u>

Explanation:

<u>Correct:</u>  b. The mass of the Carbon-14 sample is greater than the Carbon-12 sample, but the reactivity of both samples was the same .

- C-14 has two additional neutrons, so is heavier than C-12.  The chemical properties will be the same, however.

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As depth increases, the density of the layers decreases.

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3 years ago
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A baseball player hits a ball. Which is the best description of the energy of the ball as it flies over the pitcher’s head?
Elan Coil [88]

The right option is; b. mechanical

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Mechanical energy is the energy that an object acquires due to its position or due to its motion. From the question, the baseball player has chemical potential energy (stored as food) which is transformed into work. As the baseball player hits the ball, there is energy exchange in which the ball acquires energy to perform its work. The energy obtained by the ball upon which work is done is called mechanical energy.


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3 years ago
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A piece of wood with a density of 0.85 g/cm^3 has a mass of 25 g. what is the volume of the wood?
Karolina [17]
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3 years ago
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k0ka [10]

Answer:

120 g of NaCl in 300 g H20   at 90 C

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7 0
2 years ago
The reaction below demonstrates which characteristic of a base?
svlad2 [7]

Answer: option D. the ability of a base to react with a soluble metal salt.


Justification:


NaOH is a strong base, which means that in water it will dissociate according to this reaction:


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On the other hand, CuSO₄ is a soluble ionic salt which in water will dissociate into its ions according to this other reaction:

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Hence, in solution, the sodium ion (Na⁺) will  react with the metal salt in a double replacement reaction, where the highly reactive sodium ion (Na⁺) will substitute the Cu²⁺ in the CuSO₄ to form the sodium sulfate salt, Na₂SO₄ (water soluble), and the copper(II) hydroxide, Cu(OH)₂ (insoluble).


That is what the given reaction represents:


  CuSO₄ (aq)     +     2NaOH(aq)    →    Cu(OH)₂(s)       +     Na₂SO₄(aq)

         ↑                                ↑                         ↑                            ↑

soluble metal salt       strong base       insoluble base       solube salt



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3 years ago
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