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babunello [35]
3 years ago
14

Balance them i dont get how

Chemistry
1 answer:
baherus [9]3 years ago
5 0
Add in the numbers in pen

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Choose all of the secondary sources used by humans for energy !!
levacccp [35]

Answer:

Petroleum

Hydrocarbon gas liquids

Natural gas

Coal

Nuclear energy

Explanation:

These energy sources are called nonrenewable because their supplies are limited to the amounts that we can mine or extract from the earth. Coal, natural gas, and petroleum formed over thousands of years from the buried remains of ancient sea plants and animals that lived millions of years ago. That is why we also call those energy sources fossil fuels.

Most of the petroleum products consumed in the United States are made from crude oil, but petroleum liquids can also be made from natural gas and coal.

Nuclear energy is produced from uranium, a nonrenewable energy source whose atoms are split (through a process called nuclear fission) to create heat and, eventually, electricity. Scientists think uranium was created billions of years ago when stars formed. Uranium is found throughout the earth’s crust, but most of it is too difficult or too expensive to mine and process into fuel for nuclear power plants.

5 0
2 years ago
True or False, same substances have the same properties?
ryzh [129]

Answer:

True

Explanation:

Pure substances are made of the same material throughout and have the same properties throughout.

8 0
4 years ago
After the food has been chewed and lubricated, it is pushed by the tongue into the___________.
MrRissso [65]
The answer is pharynx

6 0
3 years ago
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Tính nồng độ của các ion trong dung dịch CA (OH)2 0.7M
Maurinko [17]

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Explanation:

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3 years ago
The atom having the valence shell configuration 3s2 3p3 would be:
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C is the answer......,,
8 0
3 years ago
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