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scZoUnD [109]
3 years ago
7

The scientific study of matter and the changes it undergoes is called

Chemistry
1 answer:
barxatty [35]3 years ago
5 0
A. Chemistry
The scientific study of matter and the changes it undergoes is called chemistry

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A. By referring to forces at work in the atomic nucleus, how can you
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There is an unstable ratio of protons and neutrons. Because protons are positively charged but neutrons have no charge, an increase in the number of protons means there needs to be an increase in the number of neutrons to "bind" the nucleus together. This is because like charges repel, so the protons will repel each other, and if there aren't enough neutrons to act as "glue" to hold the nucleus together, the nucleus will break apart.

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2 years ago
Which of the following is a statement of Hess's law?
attashe74 [19]

Answer:

C

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the enthalpy of reaction is independent of the reaction path

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Which material is likely to slow the<br> flow of electric charges the most? Explain.
AlladinOne [14]

Explanation:

Atoms of metals do not hold their electrons to themselves. Instead they allow them to float around them delocalised. This is important because it is this characteristic that allows metals to be good conductors of electricity since electrons are free to move around to carry a charge.

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3 years ago
Which of the following combinations will result in a reaction that is spontaneous at all temperatures?
Katen [24]

Answer:

\huge\boxed{Option \ 2}

Explanation:

A reaction is spontaneous at all temperatures by the following combinations:

=> A negative enthalpy change ( \triangle H < 0 )

=> A positive entropy change ( \triangle S > 0 )

See the attached file for more better understanding!

8 0
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In the reaction a b c, doubling the concentration of a doubles the reaction rate and doubling the concentration of b does not af
PolarNik [594]
The reaction must be a + b --> c

Then you can predict a reaction rate, r o the type r = k * a^n * b^m

Given that the reaction rate is not affected by the concentration of b you can state that m = 0 and r = k * a^n.

Now given, that there is a proportional relation between the reaction rate and a (double a gives double rate), then n = 1 and r = k*a. You can verify that if you dobule a r also doubles.

Answer: r = k*a
3 0
3 years ago
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