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7nadin3 [17]
3 years ago
11

The source of thermal energy that an internal combustion engine uses is _____

Chemistry
1 answer:
stiks02 [169]3 years ago
3 0

Answer:

the answer is coal gas

Explanation:

they were used for transportation

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Both have 5 electrons in their outermost orbits . So they exhibit similarity in their properties. Both belong to the same 15 th group of periodic table.

Sr and Rb too bear much similarity . Both are strongly electro-positive metal , difference in their atomic no being only one.

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