Conservation of Mass + Relative Mass Flashcards
1
Q
What is the law of conservation of mass
A
no atoms are lost or made during a chemical reaction SO
mass reactants = mass of products
2
Q
What is relative mass
A
the relative atomic mass of a compound
3
Q
in the periodic table which number shows relative atomic mass
A
one below each element
4
Q
what is the relative atomic mass of water
A
18
16 * 1 = O
1 * 2 = H2
5
Q
How can we use relative atomic masses to calculate percentage mass
A
work out the relative mass of molecule etc
then put the element or multiple elements you want to see as a percentage over the total relative mass.
(* 100)
