Definitions
The 3 states of matter
Solid, liquid, and gas
This change creates a new substance, such as paper burning or food decomposing.
chemical change
This action should be taken when you don’t understand a lab direction.
ask the instructor before proceeding
0.000 000 000 154 m can be expressed in this scientific notation form.
1.54 × 10⁻¹⁰ m
Boyle’s Law describes the relationship between volume and pressure in gases at constant temperature. This is how they are related.
pressure is inversely proportional to volume
Chemistry and its branches.
The study of matter, its properties, and interactions.
Organic, Inorganic, Physical, Analytical, Biochemistry, Theoretical.
This law states that matter cannot be created or destroyed, and the mass of reactants equals the mass of products.
conservation of mass
These must be worn anytime chemicals, heat, or glassware are used in the laboratory.
goggles
The significant figures in the values 0.00237 g, 0.5201 g, and 350.0 J are these.
3 SFs, 4 SFs, and 4 SFs
This phenomenon occurs because ice is less dense than liquid water due to its molecular structure.
why ice floats on water
The branch in which you learn to test the composition of blood.
Biochemistry
Examples of these types of changes include candle wax melting, water boiling, and sugar dissolving.
physical changes
Chemical waste should be disposed of in this manner after an experiment.
according to the instructor’s directions
When performing the calculation 651 × 0.024, you round the answer to this number of significant figures.
16 (2 significant figures)
These are atoms of the same element that differ in the number of neutrons.
isotopes
The branch responsible for studying how water behaves under various pressures and temperatures
Physical Chemistry
These four events include: ice melting, paper burning, rusting, and gas pressure increasing. Identify whether each is a physical or chemical change.
Physical, chemical, chemical, physical
If an experiment is not completed, this is the next step.
discuss the issue with the instructor
1.23 × 10⁴ can be written in this standard form.
12,300
This type of substance speeds up chemical reactions by lowering activation energy, without being consumed in the reaction.
a catalyst
The branch of chemistry that would study the crystal structure of iron
Inorganic Chemistry
This type of change occurs when bonds are formed, creating new compounds.
Chemical change
The first step to take if you're injured in the lab is to do this.
tell the instructor immediately
The difference between these two terms is: accuracy refers to closeness to the true value, and precision refers to consistency in repeated measurements.
accuracy and precision
At higher altitudes, the boiling point of water decreases due to this change in the atmosphere.
lower atmospheric pressure