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Vaselesa [24]
2 years ago
6

How is a radioactive element different from a stable element?

Chemistry
1 answer:
USPshnik [31]2 years ago
8 0
A radioactive element has an unstable nucleus that emits particles in the form of alpha, beta, or gamma radiation. A stable element has a nucleus that does not emit such particles
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a substance made by mixing other substances together.

Explanation:

A mixture is a substance made by mixing two or more substances together.

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G

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8 0
2 years ago
A chemist adds 0.50L of a 0.485 M copper(II) sulfate CuSO4 solution to a reaction flask. Calculate the millimoles of copper(II)
den301095 [7]

Explanation:

It is given that volume is 0.50 L and molarity is 0.485 M. Hence, number of millimoles will be calculated as follows.

               Number of millimoles = Molarity × Volume

As there are 1000 mL in 1 L. So, 0.50 L equals 500 mL.

Therefore, putting the given values into the above formula as follows.

             Number of millimoles = Molarity × Volume

                                                 = 0.485 M × 500 mL      

                                                 = 242.5

Thus, we can conclude that 242.5 millimoles of copper(II) sulfate has been added by the chemist to the flask.                                      

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3 years ago
How could a chemical change create sound
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Release of heat, color change, or produce of bubbles create are chemical changes that create sound.
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