객관식
Which of the following correctly reflects Avogadro's number?
118
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- 1. Intro to General Chemistry3h 46m
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- 23. Chemistry of the Nonmetals2h 39m
- Main Group Elements: Bonding Types4m
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- The Electron Configuration Review16m
- Periodic Table Charges Review20m
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- Noble Gas Compounds3m
- 24. Transition Metals and Coordination Compounds3h 19m
- Atomic Radius & Density of Transition Metals11m
- Electron Configurations of Transition Metals7m
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- Ligands10m
- Complex Ions5m
- Coordination Complexes7m
- Classification of Ligands11m
- Coordination Numbers & Geometry9m
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- Isomerism in Coordination Complexes17m
- Orientations of D Orbitals4m
- Intro to Crystal Field Theory10m
- Crystal Field Theory: Octahedral Complexes5m
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- 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
Mole Concept
객관식
How many moles are present in 100.0 g of water (H_2O)?
A
5.55 moles
B
3.33 moles
C
1.80 moles
D
0.555 moles
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검증된 단계별 안내1
Identify the given quantity and the substance: You have 100.0 grams of water (H\_2O).
Calculate the molar mass of water by adding the atomic masses of its elements: Hydrogen (H) has an atomic mass of approximately 1.00 g/mol, and Oxygen (O) has an atomic mass of approximately 16.00 g/mol. So, molar mass of H\_2O = (2 \(\times\) 1.00) + 16.00 = 18.00 g/mol.
Use the formula to find moles from mass: \(\text{moles} = \frac{\text{mass (g)}}{\text{molar mass (g/mol)}}\).
Substitute the known values into the formula: \(\text{moles} = \frac{100.0}{18.00}\).
Perform the division to find the number of moles of water in 100.0 g.
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