Carbon is a key element in many molecules that make up living creatures. The carbon atoms in your body .

A - Were created during the Big Bang
B - Were created when dinosaurs died and were buried by mud
C - Have existed since the beginning of time
D - Were created inside of ancient stars

How many grams of magnesium metal will react completely with 8.3 liters of 5.5 m hcl? show all of the work needed to solve this problem. mg (s) + 2hcl (aq) → mgcl2 (aq) + h2 (g)

Amixture initially contains a, b, and c in the following concentrations: [a] = 0.300 m , [b] = 1.05 m , and [c] = 0.550 m . the following reaction occurs and equilibrium is established: a+2b⇌c at equilibrium, [a] = 0.140 m and [c] = 0.710 m . calculate the value of the equilibrium constant, kc.

If 3 moles of a compound use 24 j of energy in a reaction, what is the a hreaction in j/mol?