How many moles of H are present in 3 moles of carbon trihydride? a. 3
b. 12
c. 6
d. 9

Which of these properties, used alone, would be least useful in identifying most minerals? a. color b. luster c. streak d. density

How many neutrons does a atom of cobalt have?

Which statement is usually true about the relationship between activation energy and reaction rates? low activation energy barriers result in low rates. high activation energy barriers result in low rates. low activation energy barriers result in no reaction. high activation energy barriers result in no reaction.