Concept explainers
Billions of pounds of urea,
By assuming unlimited amounts of CO2, how many moles of urea can be produced from each of the following amounts of
Interpretation:
The number of moles of urea is to be determined in the given amounts of
Concept introduction:
The characteristic mass of a compound is the formula mass of the compound, which is obtained by adding the atomic masses of all atoms.
A conversion factor is a numerical ratio, which is used to change one unit into another.
The chemical formula represents the precise number of atoms in a molecule, but not their structural arrangement.
Answer to Problem 54E
Solution: The number of moles of urea present in the molecules is given as follows:
Explanation of Solution
a)
The equivalence is obtained between moles of
In order to obtain the moles of urea, the conversion factor proceeds as follows:
Therefore, the number of moles of urea is
b)
The equivalence is obtained between moles of
In order to obtain the moles of urea, the conversion factor proceeds as follows:
Therefore, the moles of urea are
c)
The equivalence is obtained between grams of
The equivalence is obtained between moles of
In order to obtain the moles of urea, the conversion factor proceeds as follows:
Here,
Therefore, the moles of urea are
d)
The equivalence is obtained between grams of
The equivalence is obtained between moles of
In order to obtain the moles of urea, the conversion factor proceeds as follows:
Here,
Therefore, the moles of urea are
Want to see more full solutions like this?
Chapter 4 Solutions
Chemistry In Focus
- (a) Butane gas, C4H10, can burn completely in air [use O2(g) as the other reactant] to give carbon dioxide gas and water vapor. Write a balanced equation for this combustion reaction. (b) Write a balanced chemical equation for the complete combustion of C3H7BO3, a gasoline additive. The products of combustion are CO2(g), H2O(g), and B2O3(s).arrow_forward4.8 In an experiment carried out at very low pressure, 13x1015 molecules of H2 are reacted with acetylene, C2H2, to form ethane, C2H6, on the surface of a catalyst. Write a balanced chemical equation for this reaction. How many molecules of acetylene are consumed?arrow_forwardCisplatin, Pt(NH3)2Cl2, a drug used in the treatment of cancer, can be made by the reaction of K2PtCl4 with ammonia, NH3. Besides cisplatin, the other product is KCl. (a) Write a balanced equation for this reaction. (b) To obtain 2.50 g cisplatin, calculate what masses (in grams) of K2PtCl4 and ammonia you need.arrow_forward
- The equation for the reaction of phosphorus and chlorine is P4(s) + 6 Cl2(g) 4 PCl3(). If you use 8000 molecules of P4, in this reaction how many molecules of C12 are required to consume the P4 completely?arrow_forward4.24 Ammonia gas can be prepared by the reaction CaO(s)+2NH4Cl(s)2NH3(g)+H2O(g)+CaCl2(s) If 112 g of CaO reacts with 224 g of NH4Cl, how many moles of reactants and products are there when the reaction is complete?arrow_forwardThe sugar sucrose, which is present in many fruits and vegetables, reacts in the presence of certain yeast enzymes to produce ethanol and carbon dioxide gas. Balance the following equation for this reaction of sucrose. C12H22O11(aq) + H2O(l) C2H5OH(aq) + CO2(g)arrow_forward
- What is the molarity of a solution of sodium hydrogen sulfate that is prepared by dissolving 9.21 g NaHSO4 in enough water to form 2.00-L solution? What is the molarity of each ion in the solution?arrow_forward3.88 One Step in the enrichment of uranium for use in nuclear power plants involves the reaction of UO2 with hydro- fluoric acid (HF) solution. The products are solid UF4 and water. Write a balanced chemical equation for this reaction.arrow_forward77. Explain why the equivalent weight of H2SO4 is half the molar mass of this substance. How many hydrogen ions does each H2SO4 molecule produce when reacting with an excess of OH ions?arrow_forward
- In a common experiment in the general chemistry laboratory, magnesium metal is heated in air to produce MgO. MgO is a white solid, but in these experiments it often looks gray, due to small amounts of Mg3N2, a compound formed as some of the magnesium reacts with nitrogen. Write a balanced equation for each reaction.arrow_forwardThe formation of water-Insoluble silver chloride is useful in the analysis of chloride-containing substances. Consider the following unbalanced equation: BaCl2(aq) + AgNO3(aq) AgCI(s) + Ba(NO3)2(aq) (a) Write the balanced equation. (b) What mass of AgNO3, in grams, is required for complete reaction with 0.156 g of BaCI2? What mass of AgCI is produced?arrow_forward4.106 An ore sample with a mass of 670 kg contains 27.7% magnesium carbonate, MgCO3. If all of the magnesium carbonate in this ore sample is decomposed to form carbon dioxide, describe how to determine what mass of CO2 is evolved during the process.arrow_forward
- Chemistry & Chemical ReactivityChemistryISBN:9781337399074Author:John C. Kotz, Paul M. Treichel, John Townsend, David TreichelPublisher:Cengage LearningChemistry & Chemical ReactivityChemistryISBN:9781133949640Author:John C. Kotz, Paul M. Treichel, John Townsend, David TreichelPublisher:Cengage LearningChemistryChemistryISBN:9781305957404Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCostePublisher:Cengage Learning
- Chemistry: An Atoms First ApproachChemistryISBN:9781305079243Author:Steven S. Zumdahl, Susan A. ZumdahlPublisher:Cengage LearningIntroductory Chemistry: A FoundationChemistryISBN:9781337399425Author:Steven S. Zumdahl, Donald J. DeCostePublisher:Cengage LearningChemistry for Engineering StudentsChemistryISBN:9781337398909Author:Lawrence S. Brown, Tom HolmePublisher:Cengage Learning