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sdas [7]
3 years ago
7

according to the law of conservation of energy, when a lawn mower uses 750 J of chemical energy from gasoline, how much of this

energy will be transformed into mechanical, sound, or energy? A. 325 J B. 750 J C. 162 J D. 1500 J
Chemistry
1 answer:
statuscvo [17]3 years ago
7 0
Conservation of energy
all of it should be transformed since the energy is convserved (neither destroyed nor created)
so answer is B
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What mass is in 5 moles of helium?
ArbitrLikvidat [17]

Answer:

Mass = 20 g

Explanation:

Given data:

Number of moles of He = 5 mol

Mass of He = ?

Solution:

Formula:

Number of moles = mass/ molar mass

Molar mass = 4 g/mol

by putting values,

5 mol = Mass / 4 g/mol

Mass = 5 mol × 4 g/mol

Mass = 20 g

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3 years ago
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2 years ago
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3 years ago
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statuscvo [17]

Answer:

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I hope you find this information useful and interesting! Good luck!

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John Dalton and Antoine Lavoisier were alchemists who tried to convert diamonds to gold.
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8 0
3 years ago
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