IndietroGOB Chemistry Chapter 1 Key Concepts
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Termini in questo insieme (19)
Chemistry is the study of the composition, structure, properties, and reactions of matter.
Matter is all substances that make up our world, including solids, liquids, and gases.
Chemicals are substances with the same composition and properties wherever found, often made by chemists and used daily.
A set of principles involving observation, hypothesis, experimentation, and conclusion to understand natural phenomena.
- Make observations
- Propose a hypothesis
- Perform experiments
- Make a conclusion
By performing experiments to find relationships between the hypothesis and observations.
A fact or occurrence noticed during an experiment or in nature.
A judgment about the hypothesis based on experimental results.
- Connecting new info to prior knowledge
- Self-testing
- Studying regularly
- Mixing topics
The value of a digit depending on its position in a number (e.g., tens, ones, tenths).
Digit 5 is in the ones place.
- Positive × Positive = Positive
- Negative × Negative = Positive
- Positive × Negative = Negative
Divide the mass of the component by total mass, then multiply by 100%.
(13.9 g / 15.1 g) × 100% = 92% lead.
Divide both sides by \(P_2\): \(V_2 = \frac{P_1V_1}{P_2}\)
It shows the relationship between gas volume and temperature, often a direct relationship.
Move decimal 3 places left: 3.5 × 10\(^3\)
Move decimal 5 places right: 1.6 × 10\(^{-5}\)
The number between 1 and 10 multiplied by a power of 10.