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TiliK225 [7]
3 years ago
7

I need more help please with all of these problems

Chemistry
1 answer:
prohojiy [21]3 years ago
3 0

Answer:

I need points

Explanation:

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The rays produced in a cathode tube are
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Answer:

Electrons

Explanation:

Cathode rays carry electronic currents through the tube. Electrons were first discovered as the constituents of cathode rays. J.J. Thomson used the cathode ray tube to determine that atoms had small negatively charged particles inside of them, which he called “electrons.”

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2 years ago
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For which of the following activities might you want to hire a chemist?
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examining the structure of plant cells

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When a Na atom loses an electron to a Cl atom, the two atoms have opposite charges and are attracted to one another. What is the
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Answer:

Ionic bond

Explanation:

When Na loses an electron, it becomes positive ion.  

When Cl gains  an electron, it becomes negative ion.  

The electrostatic attraction between these ions is an ionic bond.

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3 years ago
1. Which graph shows the melting of crystalline solids? Explain your reasoning.
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(1) The melting of a crystalline solid is best depicted by the second graph. This is because, the second graph shows a horizontal line which means that for a while there was no change in temperature. This zone is the latent heat of fusion. 

(2) The first graph shows the graph of a solid that is just heated but does not experience phase change. However, the second graph shows a solid that changes phase (from crystal/solid to liquid). 
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If the energy of the reactants is less than
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The opposite type of reaction (where energy is taken in from the surroundings of a reaction and thus the energy of the reactants is lower than that of the products) is called an endothermic reaction
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