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navik [9.2K]
3 years ago
13

A pendulum bob at its highest point has a certain amount of potential energy. As it falls, what does the potential energy get tr

ansformed into? A. kinetic energy only B. potential energy only C. kinetic energy and heat energy D. potential energy and heat energy
Chemistry
1 answer:
Lisa [10]3 years ago
3 0
Good

Because is that true
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An open flask sitting in a lab refrigerator looks empty, but it is actually filled with a mixture of gases called air. If the fl
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Answer:

9.39 × 10²² molecules

Explanation:

We can find the moles of gases (n) using the ideal gas equation.

P . V = n . R . T

where,

P is the pressure (standard pressure = 1 atm)

V is the volume

R is the ideal gas constant

T is the absolute temperature (standard temperature = 273.15 K)

n=\frac{P.V}{R.T} =\frac{1atm.3.50L}{(0.08206atm.L/mol.K).273.15K} =0.156mol

There are 6.02 × 10²³ molecules in 1 mol (Avogadro's number). Then,

0.156mol.\frac{6.02\times10^{23}molecules}{mol} =9.39\times10^{22}molecules

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3 years ago
Which reacts faster, rock salt or grains of salt? Why?​
sweet-ann [11.9K]

Answer:

salt

Explanation:

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3 years ago
Who no this i need help i need to pass to the next grade
Hitman42 [59]

Exothermic reactions is where  energy is released. Exothermic reactions are reactions that release energy into the environment in the form of heat. Exothermic reactions feel warm or hot or may even be explosive.

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3 years ago
Nobody answering my questions what the answer givng brainliest
sergiy2304 [10]

Answer: I think it’s B. Because as you can see from the picture there are layers

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I think but just in case ask for a second opinion

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