QUESTION 33
Given the equation
NH$_3$ + O$_2$ ----> HNO$_3$ + H$_2$O
What is the smallest whole-number coefficient of O$_2$ when the equation is correctly balanced?
a. 1
b. 4
c. 2
d. 3
QUESTION 34
What is the correct order of coefficients for the unbalanced equation?
Fe + O$_2$ --> Fe$_2$O$_3$
4, 3, 2
2, 3, 4
1, 2, 3
2, 3, 2