# Physical Science Help!

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1. NO + O2 ¨ NO2

2. NH4Cl + Ca(OH)2 ¨ CaCl2 + NH3 + H2O

• Physical Science Help! -

2NO + O2 ---?? NO2
I started this one for you.. What goes in front of the NO2?

Second equation
On the left you have
You have 4 N's
4 H's 2H's or 6 H's
1 Cl
1 Ca
2 O

On the right you have
1 Ca
2 Cl
1 N
3 H and 2 H = 5 H
1 O

Start by trying to balance the Cl.

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