Which term describes this reaction?
r0 r2
r1 ,0
h3n+ -c-c +
h o-
-o-
h
h-n
h
r2,0
-c-c
h o- |
h 3n+-c-c-n-c-c
-
h
h
h
o-
h20
o
o
o
addition
condensation
elimination
substitution

What is the percent by mass of oxygen in fe2o3

An alloy contains 66 g of pure zinc. what is the percentage of zinc in the alloy? express your answer to two significant figures and include the appropriate units.

A4.86 g piece of metal was placed in a graduated cylinder containing 15.5 ml of water. the water level rose to 17.3 ml. what is the density of the metal. i need the steps of how to solve it to so i can use a formula to work out other problems.