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Chemistry-UH MT1
Study notes for Chem for Engineers at UH for MT1
Question | Answer |
---|---|
Chemistry is... | a study of the composition, structure and properties of matter and of changes that occur in matter. |
Matter is... | Anything that has mass and volume. |
Macroscopic level is... | anything that can be seen with the unaided eye. |
Microscopic level is... | Anything that is so small they can only be viewed using an instrument. |
Atoms are... | The smallest distinctive units in a sample of matter. |
Molecules are... | The combination of multiple atoms. |
Composition refers to... | The types of atoms and their relative proportions in a sample. |
Physical properties are... | a characteristic displayed by a sample of matter without undergoing any change in composition. I.e. odor, color, etc. |
Chemical properties are... | characteristics displayed by samples of matter as they undergo a change in composition. I.e. rate at which it burns. |
Qualitative properties are... | properties that do not depend on the amount of a substance. I.e. color, odor, density, flammability, etc. |
Quantitative properties are... | properties that depend on how much of a substance is present. I.e. mass, volume, etc. |
A physical change is... | Where matter undergoes a change at the macroscopic level but not the microscopic. I.e. water boiling |
A chemical change/reaction is... | Where a sample of matter undergoes a change in composition and/or its structure. |
SI Unit for length? | Metre/Meter |
SI Unit for mass? | Kilogram |
SI Unit for time? | Second |
SI Unit for temperature? | Kelvin |
SI Unit for amount of a substance? | Mole |
SI Unit for electric current? | Ampere |
SI Unit for luminous intensity? | Candela |
10^12 prefix? | Tera |
10^9 prefix? | Giga |
10^6 prefix? | Mega |
10^ 3 prefix? | Kilo |
10^2 prefix? | Hecto |
10^1 prefix? | Deca |
10^-1 prefix? | Deci |
10^-2 prefix? | Centi |
10^-3 prefix? | Milli |
10^-6 prefix? | Micro |
10^-9 prefix? | Nano |
10^-12 prefix? | Pico |