Given the various data from the question, the answers to each question is given below:
<h3>1. How to determine the number of molecules </h3>
Avogadro's hypothesis
1 mole of K₂CrO₄ = 6.02×10²³ molecules
Therefore,
0.6 mole of K₂CrO₄ = 0.6 × 6.02×10²³
0.6 mole of K₂CrO₄ = 3.612×10²³ molecules
<h3>2. How to determine the number of atoms </h3>
1 mole of K₂CrO₄ contains 2 moles of K.
Therefore,
0.6 mole of K₂CrO₄ will contain = 0.6 × 2 = 1.2 mole of K
From Avogadro's hypothesis,
1 mole of K = 6.02×10²³ atoms
Therefore,
1.2 mole of K = 1.2 × 6.02×10²³
1.2 mole of K = 7.224×10²³ atoms
Therefore, we can say that
0.6 mole of K₂CrO₄ = 7.224×10²³ atoms of K
<h3>3. How to determine the molarity </h3>
Molarity is defined as:
Molarity = mole / Volume
From the question given above, we obtained the following:
- Mole = 0.5 mole
- Volume = 2 L
- Molarity =?
Molarity = mole / Volume
Molarity = 0.5 / 2
Molarity = 0.25 M
<h3>4. How to determine the volume </h3>
From the question given above, the following data were obtained:
- Mass of solute = 50 g
- Mass of solution = 250 g
- Percentage of sugar =?
Percentage = (mass of solute / mass of solution) × 100
Percentage of sugar = (50 / 250) × 100
Percentage of sugar = 20%
<h3>5. How to determine the volume </h3>
Total volume = 2 L
Percentage of vinegar = 5%
Volume of vinegar =?
Volume = percent × total volume
Volume of vinegar = 5% × 2
Volume of vinegar = 0.1 L
Learn more about Avogadro's number:
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