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expeople1 [14]
3 years ago
14

What is most likely to refract a beam of light ?

Chemistry
1 answer:
Lorico [155]3 years ago
3 0

Answer:

change in speed

Explanation:

if a substance causes the light to speed up or slow down more, it will refract more.

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_____ energy is required to start a reaction
Deffense [45]

Answer: Activation

Explanation:

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Helppp.....Which one of the following statements does not describe gold?
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Answer: D. It reacts with oxygen in the presence of moist air.

Explanation:

The element Gold, does not react with oxygen,hence it is not affected by corrosion,neither does it rust.

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Which force is a contact force
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B. a bike braking

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It involves friction! Hope this helps!

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Which of the following chemical formula show an iconic compound
BaLLatris [955]
This question comes with this list of answer choices:

<span>A. CO₂

B.N₂O

C.NaCl

</span><span> D.C₆H₁₂O₆
</span>

Answer: option C.NaCl

Justification.

1) When two diferent elements join together chemically they can form either a covalent bond or a ionic bond.

2) When the bonds are covalents the compound is called covalent, when the bonds are ionics the compound is called ionic.

3) To predict whether the compound is ionic or covalent, you must see the electronegativities of the elements.

4) Ionic compounds require the formation of ions, a posititve ion and a negative ion. The positive ion is formed when the element loses one or more electrons. The negative ion is formed when the element gains one or more electrons.

Then, in the formation of a ionic compound it is implicit the exchange of electrons (one element gains the electrons that the other lose) and this is possible, when the difference in electronegativities are high enough.

5) So, you must look at the electronegativities to make your prediction. In the given options, the compounds of the options A, B and D are between non-metals. Then, you can predict that their electronegativities are not as much differet as to form ions. They will form covalent bonds.


6) Being sodium and chloride a metal and non-metal, you can expect that their electronegativities differ quite enough to form the ionic bond (this is not true for any pair of non-metal and metal elements, but being them the only pair of metal - non metal elements, this is the only option).

This leads to the conclusion that the NaCl formula shows an ionic compound, and is the answer.

5 0
3 years ago
Which of these is an environmental effect of burning fuels?
elena-14-01-66 [18.8K]
Temperature increase.
burning fuel produces CO2, CO2 is a greenhouse gas, which traps the energy from the sun.
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3 years ago
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