For each C3H8, you get 3 C's in CO2, so 13.2 x 3 = 39.6
For each O2, you use 5 to make 3 O2s, so (80/5)3 = 48
39.6+48= 87.6 grams
She can run 457.2 meters in 40 seconds
(4) total number of valence electrons, because they exist in the same group.
Answer:
<em>lithosphere</em><em> </em><em>(land)</em>
<em>hydrosphere (water)</em>
<em>biosphere</em><em> </em><em>(living things)</em>
<em>atmosphere (air).</em>
