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Aleks04 [339]
3 years ago
15

Show proofs that the newspaper is perfectly reassembled

Chemistry
1 answer:
s2008m [1.1K]3 years ago
4 0

Answer : The pages of the newspaper contains many pictures which are perfectly assembled as we can see that, after the experiment was done, the words, the illustrations and the pictures in the original newspaper was actually formed using the cut clippings of newspaper.


The reassembly of most of the parts in the paper was displaying a readable text on top of the newspaper, which can be considered as main indicator of newspaper being perfectly assembled.


The physical appearance of the reassembled newspaper and the original newspaper was perfect and overall the almost similar to that of of old newspaper, it gave a clear indication as the newspaper was reassembled perfectly with no mistake in it. 

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In 1939, the use of DDT (a powerful synthetic chemical) as an insecticide was discovered. The United States adopted its widespre
Natasha_Volkova [10]

Main advantages of DDT are the insecticide property and the knoledge about its chemical synthesis.

Explanation:

At that time in 1939 it was discovered that DDT have insecticide properties. It is a useful property because it allows inhibition of insects populations in large areas. Killing insects will reduce the diseases transmitted by them as  typhus and malaria. More over you prevent the destruction of the agricultural crops by the harmful insects.

However the synthesis of the molecule was known way back in 1874. From that time it was plenty of time in which chemistry knowledge evolved so the synthesis at kilograms scale was implemented. High quantities of DDT molecule become available for the market so that in 1945 was available as agricultural insecticide.

It was discovered that DDT have bad effects for human health and also over time some insects developed resistance and their were not affected anymore by the molecule.

You may find the chemical structure of DDT in the attached figure.

Lean more:

about DDT

brainly.com/question/1417051

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8 0
3 years ago
Jonas mixes citric acid with baking soda. How does he know the reaction is endothermic?
Kipish [7]

Answer:

D. The temperature of the the solution increases

Explanation:

Endothermic. Endo means in and thermic means a temperature, so Endothermic means the taking in of an temperature and the only answer choices that deal with temperature is,A and D. If it absorbs temperature it's going to rise.

6 0
3 years ago
Help me please I need to pass.
nlexa [21]

Answer:

2 C Atoms

Explanation:

When you have coefficient of 2 next to a compound element, it indicates there are 2 of each compound element. In the compound element, there is one C Atom, and 2×1 is 2.

4 0
3 years ago
Santiago's car has an overall average speed of 25 cm/s. If he could increase his car's overall average speed by 10%, what would
Evgen [1.6K]

Given:

The overall average speed = 25 cm/s.

The overall average speed increased by 10%.

To find:

The new overall average speed.

Solution:

We have,

Overall average speed = 25 cm/s.

The overall average speed increased by 10%. So, the new average speed is

New overall average speed = Initial average speed + 10% of initial  overall average speed

\text{New overall average speed}=25+\dfrac{10}{100}\times 25

\text{New overall average speed}=25+2.5

\text{New overall average speed}=27.5

Therefore, the new overall average speed is 27.5 cm/s.

3 0
3 years ago
Explain what happens in the reaction between sodium hydroxide and hydrochloric acid.Explain how protons are donated and accepted
Artyom0805 [142]

Answer:

<em><u>Hydrochloric acid and sodium hydroxide interact, resulting in salt and a release of heat. As we can see, the result of the interaction of two highly aggressive compounds is table salt and water – compounds that are ultimately harmless, even beneficial, to human beings.</u></em>

<em><u>2</u></em><em><u>)</u></em><em><u> </u></em><em><u>An acid is a substance that donates protons (in the Brønsted-Lowry definition) or accepts a pair of valence electrons to form a bond (in the Lewis definition). A base is a substance that can accept protons or donate a pair of valence electrons to form a bond.</u></em><em><u>A base is a substance that can accept protons or donate a pair of valence electrons to form a bond. Bases can be thought of as the chemical opposite of acids. A reaction between an acid and base is called a neutralization reaction.</u></em>

Explanation:

<em><u>Hope</u></em><em><u> </u></em><em><u>it helps</u></em><em><u> </u></em><em><u>you</u></em><em><u> </u></em><em><u>✌️</u></em>

<em><u>If</u></em><em><u> </u></em><em><u>helped</u></em><em><u> </u></em><em><u>Mark</u></em><em><u> </u></em><em><u>me</u></em><em><u> </u></em><em><u>as</u></em><em><u> </u></em><em><u>Brainleist</u></em><em><u> </u></em>

<em><u>Have</u></em><em><u> </u></em><em><u>a</u></em><em><u> </u></em><em><u>good </u></em><em><u>night</u></em><em><u> </u></em><em><u>ahead</u></em><em><u> </u></em><em><u>✌️</u></em>

7 0
2 years ago
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