Which statement describes potential energy? A. energy of motion B. stored energy C. energy due to heat D. used energy

Chemistry

2 answers:

Brrunno [24]3 years ago

8 0

A. Energy of motion describes potential energy

Inessa [10]3 years ago

7 0

B is the answer.

potential energy is the energy held by an object because of its position relative to other objects, stresses within itself, its electric charge, or other factors.

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Calculate the mass of chloroform that contains 1.00X10^12 molecules of chloroform

Brums [2.3K]

<span>Molar mass of chloroform (CHCl3)
C = 1 * 12 = 12 a.m.u
H = 1 * 1 = 1 a.m.u
Cl = 3 * 35.5 = 106.5 a.m.u
Molar Mass (CHCl3) = 12 + 1 + 106.5 = 119.5 g / mol

Knowing that: The value of Avogadro's constant corresponds to approximately </span> $6,02*10^{23}$ molecules, if chloroform contains $1,00 * 10^{12}$ molecules. <span>
We have:

</span> $1,00 * 10^{12} * 6,02 * 10^{23} = 6,02 * 10 ^ {35} molecules$ <span>

Now, how many grams are there in the chloroform molecule?

grams -------- molecules</span><span>
119,5 </span>→ $6,02 * 10^{23}$
x → $6,02 * 10^{35}$

$6,02 * 10 ^ {23} * x = 119,5 * 6,02 * 10 ^{35}$
$6,02 * 10 ^ {23}x = 719,39 * 10^{35}$
$x = \frac{719,39}{6,02}*10^{35-23}$
$\boxed{x = 119,5*10^{12}grams}$

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2 years ago

I'll give 50 pts and brainliest

e-lub [12.9K]

Answer:

Response is below

Explanation:

The different types of mining are underground, surface, placer, and in-situ. Underground mining uses various materials to excavate resources from beneath the surface of the Earth. Surface mining is a category of mining that in which soil and rock overlying the mineral deposit are removed. Placer mining is the mining of stream bed deposits for minerals. In-situ mining is a mining process used to recover minerals such as copper and uranium through boreholes drilled into a deposit.

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3 years ago

How many mol of C7H16 would you have if you have 76.36 grams? Give your answer to 2 decimal spaces.

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0.761 mol of $C_7H_{16}$ would you have if you have 76.36 grams.

A mole is defined as 6.02214076 × $10^{23}$ of some chemical unit, be it atoms, molecules, ions, or others. The mole is a convenient unit to use because of the great number of atoms, molecules, or others in any substance.