How many moles of KCl would be dissolved in 4 L of water to make a 2 M solution?

1 answer:

3 0

Answer:
Moles = 8 moles

Solution:
Molarity is given as,

Molarity = Moles / Volume of Solution ------ (1)

Data Given;
Molarity = 2 M

Volume = 4 L

Solving eq.1 for Moles,

Moles = Molarity × Volume of Solution

Putting values,

Moles = 2 mol.L⁻¹ × 4 L

Moles = 8 moles

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How many chlorine atoms are found in 8.3 moles of chlorine?

erik [133]

Answer:

5*10²⁴ chlorine atoms are found in 8.3 moles of chlorine.

Explanation:

Avogadro's Number or Avogadro's Constant is called the number of particles that make up a substance (usually atoms or molecules) and that can be found in the amount of one mole of said substance. Its value is 6.023*10²³ particles per mole. Avogadro's number represents a quantity without an associated physical dimension, so it is considered a pure number that allows describing a physical characteristic without an explicit dimension or unit of expression. Avogadro's number applies to any substance.

Then you can apply the following rule of three: if 1 mole of the compound contains 6.023 * 10²³ atoms, 8.3 moles of the compound how many atoms does it have?

$amount of atoms=\frac{8.3 moles*6.023*10^{23}atoms }{1 mole}$