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Chapter 3: Q3.19P (page 131)
Question: Calculate each of the following:
a. Mass % of I in strontium periodate
b. Mass % of Mn in potassium permanganate
a. Mass % of I in strontium periodate is 54.07%
b. Mass % of Mn in potassium permanganate is 54.07%
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Lead(II) chromate (PbCrO4) is used as the yellow pigment in traffic lanes, but is banned from house paint because of the risk of lead poisoning. It is produced from chromite (FeCr2O4), an ore of chromium:
Lead(II) ion then replaces the K+ ion. If a yellow paint is 0.511% PbCrO4 by mass, how many grams of chromite are needed per kilogram of paint?
When powdered zinc is heated with sulfur, a violent reaction occurs, and zinc sulfide forms:
Some of the reactants also combine with oxygen in air to form zinc oxide and sulfur dioxide. When 83.2 g of Zn reacts with 52.4 g of S8, 104.4 g of ZnS forms. What is the percent yield of ZnS? (b) If all the remaining reactants combine with oxygen, how many grams of each of the two oxides form?
Is each of the following statements true or false? Correct any that are false: (a) Amole of one substance has the same number of atoms as a mole of any other substance. (b)The theoretical yield for a reaction is based on the balanced chemical equation. (c) A limiting-reactant problem is presented when the quantity of available material is given in moles for one of the reactants. (d)To prepare 1.00 L of 3.00 M NaCl, weigh 175.5 g of NaCl and dissolve it in 1.00 Lof distilled water. (e) The concentration of a solution is an intensive property, but the amount of solute in a solution is an extensive property
Chlorine gas can be made in the laboratory by the reaction of hydrochloric acid and manganese(IV):
When 1.82 mol of reacts with excess
(a) How many moles of localid="1661936288723" react?
(b) How many grams of form?
Hemoglobin, a protein in red blood cells, carries from the lungs to the body鈥檚 cells. Iron(as ferrous ion, ) makes up 0.33 mass % of hemoglobin. If the molar mass of hemoglobin is 6.8 g/mol, how many ions are inone molecule?
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