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butalik [34]
3 years ago
12

Question 5 of 5

Chemistry
1 answer:
grandymaker [24]3 years ago
7 0

Answer:

B.

Explanation:

the SI unit for density is the kilogram per Cubic meter

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is the process through which offspring are produced. A. Heredity B. Reproduction C. Conservation D. Vaccination
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It is called Reproduction 
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A lawnmower runs on gasoline.what type of energy transformation takes place in its engine?
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Which of the following is an acid-base neutralization reaction? (1 point)
GuDViN [60]
It would be NaOH + HCl → <span>NaCl + H2O
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NaOH is sodium hydroxide, which is a strong base. HCl  is hydrochloric acid, which is a strong acid. 

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6 0
3 years ago
The reaction of iron with oxygen to form iron oxide is an example of an oxidation–reduction reaction: 4fe + 3o2 → 2fe2o3. in thi
nadya68 [22]

Answer:-

Oxygen gains electrons and is reduced.

Explanation:-

For this reaction the balanced chemical equation is

4Fe + 3O2 --> 2Fe2O3

When Oxygen is present as oxygen gas, the oxidation number of O is Zero since it is the only element present in Oxygen gas.

Similarly Iron is present in Fe with oxidation number Zero.

In the case of Fe2O3, Oxygen has the oxidation number -2 while Iron has +3.

So the oxidation number of Oxygen goes from Zero to -2.

Since the oxidation number decreases Oxygen is reduced.

Since reduction involves gain of electrons, Oxygen gains electrons.

4 0
3 years ago
Use this diagram to answer the following
mylen [45]

Answer:An atom

Explanation:

Because  molecules more spread out and have things that connnect them and are not bunched up togoether

And Atoms are all packed up like in the picture

Hope this helps!:D

4 0
3 years ago
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