Moles, data and calculation (1) Flashcards
1
Q
equation for calculating number of moles in ATOMS
A
mass(g)= number of moles(n) x relative atomic mass (Ar)
2
Q
equations for calculating the number of moles in COMPOUNDS ?
A
mass(g)= number of moles (n) x relative formula mass (Mr)
3
Q
What is a compund ?
A
a pure substance formed from loecules or ions
4
Q
What is a relative formula mass ?
A
Sum of Ar’s in the chemical formula, taking into account the number of each element present
5
Q
What is accuracy ?
A
how close a value is to the actual value
6
Q
What is precision ?
A
values that are consistaent and close to each other
