Chapter 7 - Chemical Reactions, stoichiometry and the mole Flashcards
1
Q
What does the law of conservation of mass state?
A
That matter can be neither created nor destroyed, but merely changed from one form to another.
2
Q
What does stoichiometry mean?
A
The study of quantitative aspects of formulae and equations.
3
Q
What is a limiting reagent?
A
The reactant that is all used up in a chemical reaction, because it limits the amount of product that can be formed. The amount of product formed must be calculated from this limiting reagent.
4
Q
What is Avogadro’s constant?
A
6.022 x 10^23
5
Q
How do you calculate no. of moles?
A
n=m/MM
6
Q
How do you calculate the mass of a substance?
A
m=nxMM
7
Q
How can you find the MM of an element or compound?
A
Look at the atomic weight on the periodic table.
