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ra1l [238]
2 years ago
7

How many particles are in chemicals

Chemistry
1 answer:
stepan [7]2 years ago
4 0

Answer:

6.022 x 10^23 particles

Explanation:

Chemists have chosen to count atoms and molecules using a unit called the mole (mol), from the Latin moles, meaning “pile” or “heap.”

One mole is 6.022 x 10^23 of the microscopic particles which make up the substance in question.

Hope this helped! :^)

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What is the specific latent heat of fusion for a substance that takes 550 kJ to melt 14 kg at 262 K?
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The answer is A

Explanation:

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3 years ago
A gas has a pressure of 3 atm at 350°C. What will its pressure be at 250°C? The volume and amount of gas is constant. Hint: Conv
vichka [17]

<u>We are given:</u>

P1 = 3 atm                  T1 = 623 K <em>(350 + 273)</em>

P2 = x atm                 T2 = 523 K <em>(250 + 273)</em>

<em />

<u>Solving for x:</u>

From the idea gas equation:

PV = nRT

since number of moles (n) , Volume (V) and the Universal Gas constant(R) are constants;

P / T = k   (where k is a constant)

the value of  k will be the same for a gas with variable pressure and temperature and constant moles and volume

Hence, we can say that:

P1 / T1 = P2 / T2

3 / 623 = x / 523

x = 523 * 3 / 623

x = 2.5 atm (approx)

Therefore, the final pressure is 2.5 atm

7 0
3 years ago
Irma has $500 to open a checking account. She wants an account with the lowest fees. She plans to use only her bank's ATM to
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8 0
3 years ago
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How much of a 10 M solution is needed to make 1 liter of a 1 M solution
mylen [45]

Answer:

0.1 L

Explanation:

M₁ × V₁ = M₂ × V₂

10M × V₁ = 1M × 1L

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I hope this helps :)

5 0
3 years ago
What does the large number in front of<br> the molecule represent?
madam [21]
A large number in front of a compound designates how many units there are of that compound. Parentheses can be used to designate a special structure, where other molecules are attached to the larger, complex molecule.
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3 years ago
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