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hjlf
3 years ago
6

HELP ME ILL MARK BRAINLIESTTTT PLSS ASAP

Chemistry
2 answers:
krok68 [10]3 years ago
8 0

Answer:

I think w but I don't know

Alenkasestr [34]3 years ago
7 0

Answer:

y

Explanation:

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Anouk does 150 J of work using a hammer to pull a nail out of a piece of wood, and the hammer does 105 J of work on the nail. Wh
astraxan [27]
The efficiency of any machine is given by:

efficiency = output obtained / input given

Substituting the values,
Efficiency = 105 / 150
Efficiency = 0.7

Converting this to a percentage, the efficiency of the hammer is 70%.
This is a fairly high efficiency, and this is due to the fact that the hammer is a simpler machine. The more complex a machine is, the greater are the losses in it due to friction, meaning there is a lower efficiency.
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3 years ago
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At STP , how many molecules of nitrogen gas are in 2.24 L?
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Explanation:

At STP ,2.24 L contain 0.1 mole of N²

<h2>So,No. of molecules of N2 = 6.022*10²²</h2>
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2 years ago
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Answer:

19 D

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See the periodic table

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False. Electromagnetic and Gravitational forces can overcome .
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Ionization energy is
mamaluj [8]

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