Why must the chemical equation be balanced?

A. Insure proper computation of molecular mass

B. To do extra work

C. Insure proper mole ratio between reactants and products

D. to fulfill the Law of Conservation of Energy

What element is oxidized in the following reaction? HNO3 + Cu yields Cu (NO3) 2 + NO2 + H2O a. Cu b. H c. N d. O

Calcium carbonate decomposes at 12000 C to form carbon dioxide and calcium oxide. If 25 liters of carbon dioxide are collected at 12750 C, what will the volume of this gas be after it cools to 250 C?

If all the N2 and H2 are consumed, what volume of NH3, at the same temperature and pressure, will be produced? At a certain temperature and pressure, 1.9 L of N2 reacts with 5.7 L of H2.

Which bond is the shortest in the molecule? which bond is the strongest? bond is the shortest bond. bond is the strongest bond?

3O2 (g) 2O3 (g); Keq = 1 Which equation compares the concentration of oxygen and ozone? [O2]3 = [O3]2 [O2] = [O3] [O2] = [O3]3/2 [O2]2 = [O3]3

A solution of a compound with a known extinction coefficient of 23,100 M-1cm-1 has an absorbance of 0.735 in a 1.30cm path length, what is the concentration of the solution

Balance the following equation with the smallest whole number coefficients. Choose the answer that is the sum of the coefficients in the balanced equation. Do not forget coefficients of "one". RbOH + H3PO4 → Rb3PO4 + H2O

What is the temperature of 100 liter container having 1 mole of an ideal gas at a pressure of 20 kilopascals

5.2*10^26 molecules of ch4 in volume

Which of the following statements about igneous rocks is correct A. intrusive igneous rocks are formed when magma is called above the ground. B. Extrusive igneous rocks are formed when magma is cooled above the ground C.