Quantitative Flashcards
1
Q
What is the conservation of mass?
A
No atoms are lost or made during a reaction, so the mass of the reactants equals the mass of the products.
2
Q
Metals form _ve ions
A
+
3
Q
Non-metals form __ve ions
A
-
4
Q
Ionic compounds have an overall charge of …
A
Zero
5
Q
In an ionic compound, the charges of the ions have to ______ ___, to leave an overall charge of zero
A
cancel out
6
Q
Percentage of mass in a compound = ?
A
(Ar x number of atoms of that element / Mr of the compound) x 100
7
Q
What is the value of the avogadro constant?
A
6.02 x 10^23
8
Q
Moles = ?
A
mass / RFM
