# Chemistry

posted by Jack

An experiment that led to the formation of the new field of organic chemistry involved the synthesis of urea, CN2H4O, by the controlled reaction of ammonia and carbon dioxide.

2 NH3(g) + CO2(g)= CN2H4O(s) + H2O(l)
What is the theoretical yield of urea when 100. g of ammonia is reacted with 100. g of carbon dioxide?

1. DrBob222

This is a limiting reagent problem. I do those this way.
mols NH3 = grams/molar mass
mols C = grams/molar mass

Using the coefficients in the balanced equation convert mols NH3 to mols urea.

Do the same with mols C to urea.

It is quite likely these values will be different which means one of them is not right. The correct value for mols in limiting reagent problems is ALWAYS the smaller value and the reagent responsible for that is the limiting reagent.

Using the smaller value, convert mol urea to g. g = mols x molasr mass. This is the theoretical yield.

## Similar Questions

1. ### Chemistry

Urea, NH2CONH2, is manufactured from ammonia and carbon dioxide according to the following equation: 2 NH3 (g) + CO2 (g) -> NH2CONH2(aq)+ H2O (l) What volume of ammonia gas at 25 o C and 1.5 atm is needed to make 500g of urea?
2. ### Chemistry-Enthalpies of formation

"Synthesis gas" is a mixture of carbon monoxide and hydrogen that is used to synthesize a variety of organic compounds. One reaction for producing synthesis gas is 3CH4 + 2H2O + CO2 = 4CO + 8H2 Using enthalpies of formation, calculate …
3. ### Chemistry

The Solvay process for the manufacture of sodium carbonate begins by passing ammonia and carbon dioxide through a solution of sodium chloride to make sodium bicarbonate and ammonium chloride. The equation for this reaction is H2O + …
4. ### Chemistry

The Solvay process for the manufacture of sodium carbonate begins by passing ammonia and carbon dioxide through a solution of sodium chloride to make sodium bicarbonate and ammonium chloride. The equation for this reaction is H2O + …
5. ### chemistry

1. A sample of 10.7 g of CO reacts completely with O2 to form CO2. How many grams of CO2 will be formed?
6. ### Chem HW!! Difficult! HELP!

Urea (H2NCONH2) is used extensively as a nitrogen source in fertilizers. It is produced commercially from the reaction of ammonia and carbon dioxide. 2 NH3(g) + CO2(g) ---Heat pressure---> H2NCONH2(s) + H2O(g) Ammonia gas at 223°C …
7. ### Chemistry

Ok, Need some more help... This is what I have so far. 4. Urea (NH2)2CO is prepared by reacting ammonia with carbon dioxide. The byproduct is water. 637.2g of ammonia are reacted with 787.3 g of carbon dioxide. molar mass:NH3=17 CO2=44 …
8. ### Chemistry

Ok, Need some more help... This is what I have so far. 4. Urea (NH2)2CO is prepared by reacting ammonia with carbon dioxide. The byproduct is water. 637.2g of ammonia are reacted with 787.3 g of carbon dioxide. molar mass:NH3=17 CO2=44 …
9. ### Chemistry

Urea, which has the chemical formula (NH2)2CO, is a fertilizer that can be prepared by reacting ammonia (NH3) with carbon dioxide (CO2). Given the following chemical equation, what is the theoretical yield of urea (in grams) if 4.16 …
10. ### chemistry

Examine the unbalanced equation. CH4 + O2 → CO2 + H2O What is the best classification for the unbalanced equation's reaction, and why?

More Similar Questions