Table of contents

1. Intro to General Chemistry3h 48m
2. Atoms & Elements4h 16m
3. Chemical Reactions4h 10m
4. BONUS: Lab Techniques and Procedures1h 36m
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

What is the molar mass of MgSO₄?

180.21 g/mol

142.04 g/mol

160.06 g/mol

120.37 g/mol

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Verified step by step guidance

Identify the chemical formula for magnesium sulfate, which is MgSO₄.

Determine the atomic masses of each element in the compound using the periodic table: Magnesium (Mg), Sulfur (S), and Oxygen (O).

Calculate the total mass contributed by each element: Multiply the atomic mass of each element by the number of atoms of that element in the formula. For Mg, there is 1 atom; for S, there is 1 atom; and for O, there are 4 atoms.

Add the masses of all the elements together to find the molar mass of MgSO₄. Use the formula: Molar Mass = (Atomic Mass of Mg) + (Atomic Mass of S) + 4 × (Atomic Mass of O).

Compare the calculated molar mass with the given options to determine the correct answer.