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1. Intro to General Chemistry3h 48m
2. Atoms & Elements4h 16m
3. Chemical Reactions4h 10m
4. BONUS: Lab Techniques and Procedures1h 38m
5. BONUS: Mathematical Operations and Functions48m
6. Chemical Quantities & Aqueous Reactions3h 53m
7. Gases3h 49m
8. Thermochemistry2h 37m
9. Quantum Mechanics2h 58m
10. Periodic Properties of the Elements3h 9m
11. Bonding & Molecular Structure3h 29m
12. Molecular Shapes & Valence Bond Theory1h 57m
13. Liquids, Solids & Intermolecular Forces2h 23m
14. Solutions3h 1m
15. Chemical Kinetics2h 53m
16. Chemical Equilibrium2h 29m
17. Acid and Base Equilibrium5h 1m
18. Aqueous Equilibrium4h 47m
19. Chemical Thermodynamics1h 50m
20. Electrochemistry2h 42m
21. Nuclear Chemistry2h 36m
22. Organic Chemistry5h 7m
23. Chemistry of the Nonmetals2h 39m
24. Transition Metals and Coordination Compounds3h 16m

2. Atoms & Elements

Calculating Molar Mass

General Chemistry

2. Atoms & Elements

Calculating Molar Mass

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Multiple Choice

How many grams are in 0.16 moles of sodium carbonate (Na2CO3)?

8.48 grams

16.96 grams

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Verified step by step guidance

Identify the molar mass of sodium carbonate (Na2CO3). To do this, sum the atomic masses of all the atoms in the formula: 2 sodium (Na) atoms, 1 carbon (C) atom, and 3 oxygen (O) atoms.

Use the periodic table to find the atomic masses: Sodium (Na) is approximately 22.99 g/mol, Carbon (C) is approximately 12.01 g/mol, and Oxygen (O) is approximately 16.00 g/mol.

Calculate the molar mass of Na2CO3: (2 * 22.99 g/mol) + (1 * 12.01 g/mol) + (3 * 16.00 g/mol).

Use the formula: mass (grams) = moles * molar mass. Substitute the given moles (0.16 moles) and the calculated molar mass of Na2CO3 into this formula.

Perform the multiplication to find the mass in grams of 0.16 moles of sodium carbonate.