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Norma-Jean [14]
3 years ago
5

A solution has a hydrogen ion (or hydronium ion) concentration of 1.00×10−9 M.

Chemistry
1 answer:
kramer3 years ago
6 0
The ph of the solution with is 9.0
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4 electrons should be moving outside the nucleus
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3 years ago
A car's engine runs on gasoline. A scientist describes the engine to be about 12% efficient. What does this mean?
Advocard [28]

Efficiency is the estimation of output power by any machine. A 12% efficient engine has an output provided by the input energy of the engine. Thus, option D is correct.

<h3>What is efficiency?</h3>

Efficiency is defined as the energy given by the machine, engine, or any system by utilizing the input power or energy. It is given as,

η = Output ÷ Input × 100%

It is used to know the ability of the machine to transfer the input energy to an external amount of work. The engine with 12% efficiency is said to have produced energy by utilizing the provided 12% input.

Therefore, option D. the 12% of input power is used by the engine to produce the energy.

Learn more about efficiency here:

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2 years ago
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natulia [17]
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8 0
3 years ago
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a little kitten jumps from a tree and hits the ground 2.6 seconds later.with this information calculate the cat's velocity right
Harlamova29_29 [7]
The initial velocity is equal zero 
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3 0
3 years ago
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Density is defined as how tightly or loosely packed a substance is, or to the number of things or people in a certain area.

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