Unit 2 Section Flashcards
Name given to numbers written below the line in a formula to indicate the number of certain kind of atoms?
Subscript
Name given to numbers in an equation placed before a symbol or formula
Coefficient
According to the law of conservation of atoms, there must be (same/different) number of atoms on the product side of the equation as on the reactant side
Same
What does a word equation indicate
The substances that are produced
The quantities of substances involved
What happens in the reaction
The substances that enter into a chemical reaction
The term given to the materials used in a chemical process
Reactants
Name the elements that are diatomic in their free state
H2,O2,F2,Br2,Cl2
What name is given to a number of atoms or molecules large enough to be weighed in grams
Moles
Molar mass is the mass of one mole of any substance (t/f)
True
Molar mass is equal to the atomic mass in grams (t/f)
False
Molar mass has the units ?
G/mol
To find the molar mass of a compound (add,multiply,subtract,divide) the molar mass of the atoms in a compound
Add
The coefficient represents 2 things
- # of moles of products and reactants
- # of molecules or atoms of products and reactants
The mineral resources of our planet are (renewable,no resale) and (fairly evenly,not evenly) distributed
Nonrenewable
Fairly evenly
The molar mass of a compound is the ___ of the molar mass of the atoms in a compound
Sum
If a resource is ____it means that the resources can be replaced by the nature in a short period of time
Renewable
3 renewable resources
Soil,plants/animals,water
3 renewable resources
Metals
Coal
Petroleum
We are in danger of exhausting our supplies of copper because : copper atoms are being ___ in the enviorment
Seattle
____ chemistry is an approach that aims to eliminate pollution in industrial setting by preventing it from happening in the first place through enactment of one or more of the four R’s
Green
The best way to deal wisely with the words resources is to ____ our resources
Conserve
4 R’s we use to determine rate of the resources
Rethinking
Reusing
Replacing
Recycling
What are the steps to finding the correct mole conversation
Find the molar mass
Set up the rail tracks
Plug in the conversion factor
Divide or multiply as needed
What is the name we give atoms that are formed in groups of two, are not combined with another atoms.
Molecule
Molar mass is the mass of one mole of any substance
True
Molar mass is equal to the atomic mass in grams
False
Molar mass has the units g/mol
True
