CHEMISTRY: TOPIC TWO Flashcards
1
Q
A chemical formula is an expression used to represent
A
elements and compounds
2
Q
what is the total number of atoms in the formula Ca(NO3)2
A
9
3
Q
which is an empirical formula
S2H2
H2O2
C2Cl2
CaCl2
A
CaCl2
4
Q
what is the qualitative and quantitative information given by the formul Ca3(PO4)2
A
Ca-3
O-8
P-2
5
Q
pure nitrogen combines directly with an active metal to form a
A
nitride
6
Q
in a sample of solid Al(NO3)3, the ratio of aluminum ions to nitrate ions is
A
1:3
7
Q
what is the total number of atoms in (NH4)2SO4
A
15
