Quantative Chemistry Flashcards
1
Q
Total mass of reactants =
A
Total mass of products
2
Q
What is the name of the law that says that the total mass of reactants in a chemical reaction must equal the total mass of products?
A
The law of conservation of mass
3
Q
The relative formula mass =
A
Relative atomic mass
4
Q
What are the steps when calculating the relative formula mass of a compound?
A
- Identify the Ar of each element
- Multiply the Ar by the number of atoms
- Add up the totals for each element
5
Q
Examples of reactions in which mass changes
A
Zinc + hydrochloric acid
Burning of wood
Corrosion of metals
6
Q
How does increasing the degree of uncertainty affect the range of results expected to be obtained?
A
Increases the expected range
7
Q
What formula shows the simplest ratio of atoms which make up a molecule?
A
The empirical formula
8
Q
What is the number 6.02x10 to the power of 23 also known as?
A
Avogadro’s constant
