Multiple Choice
What mass (in kg) does 5.01 moles of iron (Fe) have? (Molar mass of Fe = 55.85 g/mol)
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Table of contents
- 1. Intro to General Chemistry3h 48m
- Classification of Matter18m
- Physical & Chemical Changes19m
- Chemical Properties7m
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- Intensive vs. Extensive Properties13m
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- Dimensional Analysis17m
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- 2. Atoms & Elements4h 16m
- The Atom9m
- Subatomic Particles15m
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- Ions27m
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- Periodic Table: Classifications11m
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- 23. Chemistry of the Nonmetals2h 39m
- Main Group Elements: Bonding Types4m
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- 24. Transition Metals and Coordination Compounds3h 16m
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- Ligands10m
- Complex Ions5m
- Coordination Complexes7m
- Classification of Ligands11m
- Coordination Numbers & Geometry9m
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- Orientations of D Orbitals4m
- Intro to Crystal Field Theory10m
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- Crystal Field Theory: Square Planar Complexes4m
- Crystal Field Theory Summary8m
- Magnetic Properties of Complex Ions9m
- Strong-Field vs Weak-Field Ligands6m
- Magnetic Properties of Complex Ions: Octahedral Complexes11m
2. Atoms & Elements
Calculating Molar Mass
Struggling with General Chemistry?
Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
How many atoms are present in one formula unit of magnesium hydroxide, Mg(OH)_2?
A
3
B
4
C
7
D
5
Verified step by step guidance1
Identify the chemical formula given: Mg(OH)\_2, which represents magnesium hydroxide.
Break down the formula into its constituent atoms: Mg, O, and H.
Count the number of each type of atom in one formula unit: 1 magnesium (Mg), 2 oxygen (O) atoms (because of the subscript 2 outside the parentheses), and 2 hydrogen (H) atoms (also multiplied by 2).
Add the total number of atoms together: 1 (Mg) + 2 (O) + 2 (H).
Sum these values to find the total number of atoms in one formula unit of Mg(OH)\_2.
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