Answer:
B. Molecules of different types of atoms that are not attracted to each other.
Explanation:
On a broad basis, matter can be subdivided into pure or distinct substances and impure substances (mixtures);
Pure substances are distinct substances having the following properties:
- All parts are the same throughout
- Composition is definite
- They cannot easily be separated or broken down into simpler substances by physical means.
- Separation by physical methods is not easy.
- They have a unique set of physical properties.
From this criteria, we see that the second choice is nullified. This is because pure substances have their molecules attracted to each other.
Answer:
count how many electrons it 'owns'
Their average speed during the trip is 53 km/ hr approximately
Explanation: The family traveled 80 km/hr for an hour and then trabeled 40 km/ hr for 2 hours. So they traveled 80 km in one hour then 80 km in the next 2 hours. Total they traveled 160 km in 3 hours.
Average speed = distance traveled/ taken time
= 160/3 = 53.33
Answer:
<u>NONE OF THE ABOVE </u>
Explanation:
None of the above are examples of an oxidation - reduction or a redox reaction . This is because there is no change in the oxidation state of any of the elements in the reaction when the reaction happens .
- <em> For a redox reaction , transfer of electrons must take place.</em>
- <em>The oxidation states must increase or decrease in atleast 2 of the elements of a compound.</em>
- For example :
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