Table of contents

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

1. Intro to General Chemistry

Scientific Notation

General Chemistry

1. Intro to General Chemistry

Scientific Notation

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Multiple Choice

Which of the following numbers is correctly expressed in scientific notation?

0.345 x 10^6

345 x 10^3

34.5 x 10^4

3.45 x 10^5

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Verified step by step guidance

Step 1: Understand the format of scientific notation, which is expressed as \( a \times 10^n \), where \( 1 \leq a < 10 \) and \( n \) is an integer.

Step 2: Evaluate the first option, \( 0.345 \times 10^6 \). The coefficient \( 0.345 \) is not between 1 and 10, so this is not correctly expressed in scientific notation.

Step 3: Evaluate the second option, \( 345 \times 10^3 \). The coefficient \( 345 \) is greater than 10, so this is not correctly expressed in scientific notation.

Step 4: Evaluate the third option, \( 34.5 \times 10^4 \). The coefficient \( 34.5 \) is greater than 10, so this is not correctly expressed in scientific notation.

Step 5: Convert \( 34.5 \times 10^4 \) to correct scientific notation by moving the decimal point one place to the left to get \( 3.45 \), and increase the exponent by 1 to maintain the value, resulting in \( 3.45 \times 10^5 \).