How much heat is given off when 8 g of hydrogen reacts in: 2h₂ + o₂ → 2h₂o; δh = -115.60 kcal
a. -57.8 kcal
b. -115.6 kcal
c. -173.4 kcal
d. -231.2 kcal
e. -462.4 kcal

What are the similarities of physical and chemical change ?

An atom's configuration based on its number of electrons ends at 3p4. another atom has seven more electrons. starting at 3p, what is the remaining configuration? 3p63d34s2 3p43d54s2 3p64s23d3 3p44s23d

How does a noncompetitive inhibitor reduce an enzyme’s activity?