2. consider the reaction 2 cg h18 (4) +250â (9) ⺠16 co, (g) + 18 hâo(g) la how many moles of h20co) are produced, when |--16: 15 moles of ca hiq react?- mokes hâo | b. how many grams of oxygen are needed to completely react with 878 g of cq hig?- g02

Answer :

(a) The moles of water produced are 145.35 moles.

(b) The mass of oxygen needed are 3080.8 grams.

Solution for part (a) : Given,

Moles of = 16.15 moles

First we have to calculate the moles of

The balanced chemical reaction is,

From the balanced reaction we conclude that

As, 2 moles of react to give 18 moles of

So, 16.15 moles of react to give moles of

The moles of water produced are 145.35 moles.

Solution for part (b) : Given,

Mass of = 878 g

Molar mass of = 114 g/mole

Molar mass of = 32 g/mole

First we have to calculate the moles of .

Now we have to calculate the moles of

The balanced chemical reaction is,

From the balanced reaction we conclude that

As, 2 moles of react with 25 moles of

So, 7.702 moles of react with moles of

Now we have to calculate the mass of .

The mass of oxygen needed are 3080.8 grams.

c, liquids evaporate, creating a gas