Interpretation:
The formation of
What mass of
Concept Introduction:
The yield of sequential reactions is based on yield of each previous reaction also.
The percentage yield is calculated as.
Also.
Moles is related to mass of a compound as.
The atomic mass of each element (
- Chlorine is 35.5
- Potassium is 39
- Hydrogen is 1
- Oxygen is 16
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Chapter 4 Solutions
Introduction to General, Organic and Biochemistry
- 4-25 In the chemical test for arsenic, the gas arsme, AsH3, is prepared. When arsine is decomposed by heating, arsenic metal deposits as a mirror-like coating on the surface of a glass container and hydrogen gas, H2, is given off. Write a balanced equation for the decomposition of arsine.arrow_forward4-20 Calcium oxide is prepared by heating limestone (calcium carbonate, CaCO3) to a high temperature, at which point it decomposes to calcium oxide and carbon dioxide. Write a balanced equation for this preparation of calcium oxide.arrow_forward4-62 Iron ore is converted to iron by heating it with coal (carbon), and oxygen according to the following equation: If the process is run until 3940. g of Fe is produced, how many grams of CO2 will also be produced?arrow_forward
- 4-93 Ammonia is prepared industrially by the reaction of nitrogen and hydrogen according to the following equation: If 29.7 kg of N2 is added to 3.31 kg of H2, (a) Which reactant is the limiting reagent? (b) How many grams of the other reactant are left over? (c) How many grams of NH3 are formed if the reaction goes to completion?arrow_forward4-23 When solid carbon burns in a limited supply of oxygen gas, the gas carbon monoxide, CO, forms. This gas is deadly to humans because it combines with hemoglobin in the blood, making it impossible for the blood to transport oxygen. Write a balanced equation for the formation of carbon monoxide.arrow_forward4-52 The molecular weight of hemoglobin is about 68,000 amu. What is the mass in grams of a single molecule of hemoglobin?arrow_forward
- 4-61 In photosynthesis, green plants convert CO2 and H2O to glucose, C6H12O6. How many grams of CO2are required to produce 5.1 g of glucose?arrow_forward4-54 Answer true or false. (a) Stoichiometry is the study of mass relationships in chemical reactions. (b) To determine mass relationships in a chemical reaction, you first need to know the balanced chemical equation for the reaction. (c) To convert from grams to moles and vice versa, use Avogadro’s number as a conversion factor. (d) To convert from grams to moles and vice versa, use molar mass as a conversion factor. (e) A limiting reagent is the reagent that is used up first. (f) Suppose a chemical reaction between A and B requires 1 mol of A and 2 mol of B. If 1 mol of each is present, then B is the limiting reagent. (g) Theoretical yield is the yield of product that should be obtained according to the balanced chemical equation. (h) Theoretical yield is the yield of product that should be obtained if all limiting reagent is con verted to product. (j) Percent yield is the number of grams of product divided by the number of grams of the limiting reagent times 100. (j) To calculate percent yield, divide the mass of product formed by the theoretical yield and multiply by 100.arrow_forward4-77 To convert 1 mol of iron(III) oxide to its elements requires 196.5 kcal: How many grams of iron can be produced if 156.0 kcal of heat is absorbed by a large-enough sample of iron(III) oxide?arrow_forward
- 4-55 For the reaction: (a) How many moles of N2 are required to react completely with 1 mole of O2? (b) How many moles of N2O3 are produced from the complete reaction of 1 mole of O2? (c) How many moles of O2 are required to produce 8 moles of N2O3?arrow_forward4-59 Chlorine dioxide, ClO2, is used for bleaching paper. It is also the gas used to kill the anthrax spores that contaminated the Hart Senate Office Building in the fall of 2001. Chlorine dioxide is prepared by treating sodium chlorite with chlorine gas. (a) Balance the equation for the preparation of chlorine dioxide. (b) Calculate the weight of chlorine dioxide that can be prepared from 5.50 kg of sodium chlorite.arrow_forward4-91 Assume that the average red blood cell has a mass of 2 × 10-8 g and that 20% of its mass is hemoglobin (a protein whose molar mass is 68,000). How many molecules of hemoglobin are present in one red blood cell?arrow_forward
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