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3 years ago

How many atoms of oxygen in 4 molecules of HNO3?

Chemistry

2 answers:

DaniilM [7]3 years ago

8 0

Answer:12

Explnation:

MrRissso [65]3 years ago

4 0

Answer:

12 oxygen atoms are in 4 molecules of HNO3?

Explanation:

the amounts of atoms of all the component in HNO3, which are 1 atom of Hydrogen, 1 atom of Nitrogen and 3 atoms of Oxygen.

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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.

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3 years ago

What effect does reusing or recycling municipal waste have on environmental resources? Group of answer choices increased use of

Effectus [21]

Answer:

preservation of raw materials

Explanation:

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3 years ago

How does the location of mesosaurus fossils support the theory of continental drifts?<br>

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Answer:

For this reason, the existence of Mesosaurus helps support the theory of continental drift; that is, the now-well-attested fact that South America and Africa were joined together into the giant continent Gondwana 300 million years ago before the continental plates supporting them broke apart and drifted.

Explanation:

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When methane is completely combusted in oxygen forming carbon dioxide and

Goshia [24]

Answer:

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Explanation:

Hope this helps.

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