Consider the following unbalanced chemical equation. c5h12(l) + o2(g) → co2(g) + h2o(l) if 21.9 grams of pentane (c5h12) are burned in excess oxygen, how many grams of h2o will be produced?

Answer : The mass of water produced will be 32.78 grams.

Explanation : Given,

Mass of = 21.9 g

Molar mass of = 72.15 g/mole

Molar mass of = 18 g/mole

First we have to calculate the moles of .

Now we have to calculate the moles of .

The balanced chemical reaction will be,

From the balanced reaction we conclude that

As, 1 mole of react to give 6 moles of

So, 0.3035 moles of react to give moles of

Now we have to calculate the mass of .

Therefore, the mass of water produced will be 32.78 grams.

each chemical family is represented as a group or column on the periodic table. based on chemical properties, there are 6 types of chemical families. group 1 represents alkali metals, group 2 represents alkaline earth metals, groups 3 to 12 represent transition metals, groups 13 to 16 represent non-metals and other metals, group 17 represents halogens and group 18 represents noble gases.