Chemistry Unit Flashcards
(37 cards)
What is matter?
Matter is anything that takes up space. Everything is made up of matter. Matter is anything that has two things in common, mass and volume.
What is mass?
Mass is the amount of matter in an object. The main units are grams. Mass can be calculated by density multiplied by volume.
What is volume?
Volume is the amount of space an object takes up. Volume can be calculated by mass divided by density. The main units for solids are cubic meters, and for gasses and liquids are liters.
What is density?
Density is a physical property related to mass and volume. Density is the quantity of mass in a certain volume of materials. The main units for solids are grams per cubic meter, and for gasses or liquids are grams per liter.
How do you determine if an object sinks or floats?
If the volume is greater or less than 1 gram per cubic milliliter.
How do you measure mass and volume?
You can measure mass and volume in two methods. The first step is using direct measurements, where you measure an object directly using only the device. The second is using indirect measurements, where you require more than 1 step to measure the object.
What is the displacement of water technique?
The displacement of water technique uses water to measure the volume of the object. The equation is: volume of water + object, - volume of water.
How can matter be discerned?
Matter can be discerned by its physical and chemical properties. For example:
- Reactivity of oxygen
- Reactivity of acids
- Combustibility
What if the matter has no chemical properties?
Matter with no chemical properties are identified as inert.
What is a chemical change?
A chemical change is a change of matter that produces new substances. You know if a chemical change is occurring if the object is changing color, texture, or smell.
What is a physical change?
A physical change is a change of matter that does not alter its chemical identity or composition. You know if a chemical change is occurring if an object is boiling, freezing, and turning into a gas.
What are the two classifications of matter?
Matter is either a pure substance, or a mixture. A pure substance is homogeneous, and a mixture is heterogeneous.
What are homogeneous and heterogeneous substances?
A homogeneous substance is uniform or looks the same throughout. A heterogeneous substance has individual components that can be seen, and are non-uniform.
What are mixtures?
Mixtures can be separated into parts using the physical properties of each component
What are the two classifications of pure substances?
The two classifications of pure substances are elements and compounds.
What are elements?
Elements are pure substances that cannot be separated or broken down by physical or chemical changes. Elements are made up of only one type of atom
What are compounds?
Compounds are pure substances that can be bracken down into two or more elements through a chemical change. Compounds are two or more different elements combined together.
What are the three classifications of mixtures?
The three classifications of matter are solutions, suspensions, and mechanical mixtures.
What are solutions?
Solutions are mixtures with at least one material that dissolves into another solvent, producing a homogeneous mixture.
What are suspension?
Suspension is a mixture of at least one material that is mixed with another, but does not dissolve and separates if left undisturbed.
What are chemicals?
Chemicals are the same as matter.
What is chemistry?
Chemistry is the study of matter.
What are the branches of chemistry?
The branches of chemistry are: 1. Organic Chemistry 2. Inorganic Chemistry 3. Physical Chemistry 4. Biochemistry 5 Analytical Chemistry.
What is natural substances?
Natural substances are substances that exist naturally in the environment.
