How many hydrogen atoms are present in 25.3 g of C3H8 (propane)? How many carbon atoms? please help me!

How does the viscosity of magma change as magma cools?

Which of the following represents the ester functional group? a. -coo- b. -cho c. -cooh d. c=o

Insoluble sulfide compounds are generally black in color. which of the following combinations could yield a black precipitate? check all that apply. na2s(aq)+kcl(aq) li2s(aq)+pb(no3)2(aq) pb(clo3)2(aq)+nano3(aq) agno3(aq)+kcl(aq) k2s(aq)+sn(no3)4(aq)