Avogadro's Number Worksheet
This worksheet covers Avogadro's Number, its definition, significance, and applications in calculating moles, mass, and number of particles for Grade 10 Chemistry students.
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Avogadro's Number Worksheet
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Read each question carefully and answer to the best of your ability. Show all your work for calculations.
1. Avogadro's number is approximately particles per mole.
2. A mole is defined as the amount of substance that contains as many elementary entities as there are atoms in exactly 12 grams of -12.
3. The molar mass of a substance is numerically equal to its atomic or molecular mass expressed in per mole.
1. Which of the following represents Avogadro's number?
6.022 x 10^22
6.022 x 10^23
1.000 x 10^23
1.000 x 10^22
2. How many atoms are present in 2 moles of Helium (He)?
6.022 x 10^23 atoms
1.2044 x 10^24 atoms
3.011 x 10^23 atoms
1.2044 x 10^23 atoms
1. Avogadro's number is used to convert between moles and the number of particles.
True
False
2. The molar mass of a compound is the sum of the atomic masses of all atoms in the compound.
True
False
1. Calculate the number of moles in 45.0 grams of water (H₂O). (Atomic masses: H=1.01 g/mol, O=16.00 g/mol)
2. How many molecules are in 0.5 moles of oxygen gas (O₂)?
Observe the image of a water molecule below and answer the following question:
If you have 3 moles of water, how many hydrogen atoms are present?