History
Who stated the law of conservation of mass?
Antoine Lavosier
What is matter?
Anything that occupies space and has weight.
What type of property is density?
Physical property
What are the 5 important S.I. units?
Mass, length, temperature, time, and amount of substance
Can an element be broken down into its separate components?
No! An element is already in its simplest form.
Who stated the law of definite proportions?
Joseph-Louis Proust
What is an element?
What kind of mixture is dish soap?
Homogenous
What is the unit for the amount of substance?
moles (mol)
Are phase transformations a physical or chemical change?
Physical change
Who stated the law of multiple proportions
John Dalton
What is a homogeneous mixture?
A mixture that has the same composition throughout.
What is the phenomenon that holds atoms in substances together?
Chemical bonds
What is the name for μg?
micro grams
How are mixtures separated?
By a physical process.
When was the law of definite proportions introduced?
1794
What is a chemical property?
Properties that can only be observed by reacting the substance with something else to form another substance.
What is it called when a solid changes into a gas?
Sublimation
How many meters are in a Mm (mega meter)
106 or 1,000,000
Is a heterogeneous mixture uniform throughout?
No, heterogeneous mixtures have visibly different components.
When was the law of multiple proportions introduced?
1804
What is the law of multiple proportions?
When two elements combine to form more than one compound, the weights of one element that combine with a fixed weight of the other are in a ratio of small whole numbers. (ex. CO and CO2)
What is the equation for density?
d=m/v
How many µm in 5.6m?
5,600,000µm
What elements are in MgCl2, and how many atoms are there for each element?
The elements are Magnesium and Chlorine. There is one Magnesium and two Chlorine.