PLEASE ANSWER ALL



1.) wich element(s) is/are not balanced in this equation

Pb(NO3)2 + 2 K I -> pbCI2 + KNO3

K
K, N, and O
N and O
Pb, N, and O

2.)Wich element(s) is/are not balanced in this equation

Fe2O3 + 3 CO -> Fe + 3 CO2

only the Fe is unbalanced
Only the O is unbalanced
Fe and O are both unbalanced
C and O are both unbalanced

3.)Wich of these equations is balanced

A.) 3 H2SO4 + 2AI -> AI2(SO4)3 + 3H2

B.) 2KCI + Pb(NO3)2 -> 2KNO3 + PbCI2

a
b
a and b
neither

4.) How would you balance this equation H2CO3 -> CO2 + H2O

place a 2 in front of the CO2
place a 2 in front of the H2Co3 and H2O
Add an O to the product side
It is already balanced

5.) Chromium (Cr) can combine with chlorine (CI2) to form Chromium chloride (CrCI3). Wich equation is a correct representation of this reaction

Cr+ CI2 -> CrCI3
2Cr+ CI2 -> CrCI3
2Cr+ 3CI2 -> CrCI3
2Cr+ 3CI2 -> 2CrCI3