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barxatty [35]
4 years ago
9

How is radioactive elements used for medical diagnosis

Chemistry
1 answer:
Lynna [10]4 years ago
5 0
It is all of the above.
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Classify the following items based on the type of polymer they are made from: raincoats and leather shoes.
Karolina [17]
In order to clasify these based on the type of polymer they are made from, we can say that B. <span>Leather shoes are made from natural polymers; raincoats are made from synthetic polymers, is the most accurate option from the ones you are giving me. Hope this is useful</span>
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3 years ago
Hi......................... HELLO
GREYUIT [131]

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7 0
3 years ago
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3. Identify the spectator ion(s) in the following reaction.
Arlecino [84]
Answer is e ht and ct
3 0
3 years ago
If a sample contains 21.2 g N, how many moles of N does it contain?
cupoosta [38]

Hello!

If a sample contains 21.2 g N, how many moles of N does it contain?

0.66 mol

1.51 mol

14.01 mol

297.01 mol

We have the following data:  

m (mass) = 21.2 g

MM (Molar mass of Nitrogen) = 14 g / mol

n (number of moles) = ?

Formula:  

n = \dfrac{m}{MM}

Solving:  

n = \dfrac{m}{MM}

n = \dfrac{21.2\:\diagup\!\!\!\!\!g}{14\:\diagup\!\!\!\!\!g/mol}

\boxed{\boxed{n\approx 1.51\:mol}}\end{array}}\qquad\checkmark

Answer:

1.51 mol

_______________________________

I Hope this helps, greetings ... Dexteright02! =)

5 0
4 years ago
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A student needed to dissolve a substance that she knew was soluble in water. according to the chart, which other solvent would m
Dmitry [639]
The chart is attached below and the options are as follow,

A Benzene

B Methanol

C Hexane

D Octane

Answer:
             Option-B (Methanol) is the correct answer.

Explanation:
                    As we know that the substance given to student is soluble in water. Therefore, those substances which are soluble in water are polar in nature because water is polar in nature and Like Dissolves Like.
                    Hence, in chart it can easily be seen that Methanol is also polar in nature due to presence of -O-H (polar) bond. So, the substance will dissolve in it.

8 0
3 years ago
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