Chemistry Basics Flashcards
What is 85,000 in scientific notation?
8.5 x 10^4
How would 6.1 x 10^5 be written in standard notation?
610,000
Multiply (3.1 x 10^4) by (2.0 x 10^3).
6.2 x 10^7
How many significant figures are there in number 92.07?
4
How many significant figures are there in the number 6100?
2
How many significant figures are there in the number 0.0070?
2
Which conversion factor would you use to convert 752 miles into kilometers – 1 mile / 1.6 km or 1.6 km / 1 mile?
1.6 km / 1 mile
Matter that always has exactly the same composition is classified as what?
Pure substance
What type of substance only contains one type of atom?
An element
Which substance always contains two or more elements joined in a fixed proportion?
A compound
In which type of mixture are the parts noticeably different from one another?
Heterogeneous
In which type of mixture are the substances so evenly distributed that it is difficult to tell one from another?
Homogeneous
Which type of property can be observed or measured without changing the composition of the material?
Physical
What kind of change occurs when a physical property of the material changes but the basic substance remains the same?
Physical
What kind of property is the ability to produce a change in the composition of matter?
Chemical
What kind of change occurs when a substance reacts and forms one or more new substances?
Chemical
Viscosity, conductivity, melting and boiling points, and density are what kind of properties?
Physical
Flammability and reactivity are what type of properties?
Chemical
Change in color, producing a gas, or forming a precipitate are indicators of what type of change?
Chemical
Name the five states of matter.
Solid, liquid, gas, plasma, and Bose-Einstein condensates
What is the energy of motion called?
Kinetic energy
What is caused when particles of a gas collide with the walls of the container in which it is held?
Pressure
What is the metric unit for measuring pressure?
Pascal (Pa)
Name three factors that affect gas pressure.
Temperature, volume, and number of particles
Is it a phase change a physical change or a chemical change?
Physical
What happens to the temperature of a substance during a phase change?
It does not change. It remains steady.
A system absorbs energy from its surroundings during what type of change?
Endothermic
A system releases energy to its surroundings during what type of change?
Exothermic
Name the phase changes involving solids and liquids.
Melting and freezing
Name the phase changes involving liquids and gases.
Vaporization and condensation
Name the phase changes involving solids and gases.
Sublimation and deposition
