Concept explainers
(a)
Interpretation:
The amount of substance in
(a)
Explanation of Solution
The given substance is methanol
Mass of carbon
Mass of hydrogen
Mass of oxygen
Molar mass of the given substance that is methanol
Then amount of substance or number of moles
(b)
Interpretation:
The amount of substance in
(b)
Explanation of Solution
The given substance is phosgene
Mass of carbon
Mass of oxygen
Mass of chlorine
Molar mass of the given substance that is phosgene
Then amount of substance or number of moles
(c)
Interpretation:
The amount of substance in
(c)
Explanation of Solution
The given substance is ammonium nitrate
Mass of nitrogen
Mass of oxygen
Mass of hydrogen
Molar mass of the given substance that is ammonium nitrate
Then amount of substance or number of moles
(d)
Interpretation:
The amount of substance in
(d)
Explanation of Solution
The given substance is magnesium sulfate heptahydrate
Mass of magnesium
Mass of oxygen
Mass of hydrogen
Mass of sulfur
Molar mass of the given substance that is sulfate heptahydrate
Then amount of substance or number of moles
(e)
Interpretation:
The amount of substance in
(e)
Explanation of Solution
The given substance is silver acetate
Mass of silver
Mass of oxygen
Mass of hydrogen
Mass of carbon
Molar mass of the given substance that is silver acetate
Then amount of substance or number of moles
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Chapter 2 Solutions
Chemistry: The Molecular Science
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- 3.) Tetraphosphorus decaoxide reacts with water to form phosphoric acid, a major industrial acid. In the laboratory, the oxide is used as a drying agent (a) What is the mass (in g) of 4.59 x 1022 molecules of tetraphosphorus decaoxide? (b) How many P atoms are present in this sample?arrow_forwardCalculate the number of molecules present in each of the following samples.(a) 0.800 mol acetylene, C2H2, a fuel used in welding molecules(b) How many molecules are in a snowflake containing 3.00 10-5 g of H2O molecules(c) a 500. mg tablet of vitamin C, C6H8O6 NOTE THE UNITS OF mg. molecules(d) how many ATOMS are in the vitamin C sample in part (c)? ATOMS(d) how many ATOMS of oxygen are in the vitamin C sample in part (c)? ATOMSarrow_forward3) An organic compound contains only C, H, and O. Complete combustion of a 3.185 g sample in an excess of oxygen yields 8.846 g CO2 and 2.507 g H2O. (a) What is the percent composition, by mass, of this compound? (b) What is the empirical formula of the compound? (c) If the molar mass of this compound is 206 g/mol, what is the molecular formula? (C: 12.01 g/mol; H: 1.01 g/mol; O: 16.0 g/mol)arrow_forward
- In a lab experiment, 8.21 g of phosphorus reacts with bromine to form 71.75 g of phosphorus tribromide. (a) Caculate the precentage by mass of P in phosphorus tribromide. (b) How many grams of bromine reacted?arrow_forwardA 1.30 g sample of titanium chemically combines with chlorine gas to form 5.16 g of titanium chloride. (a) What is the empirical formula of titanium chloride? (b) What is the percent by mass of titanium and the percent by mass of chloride in the sample?arrow_forward(c) An organic compound consists of carbon, hydrogen and sulfur only.The percentage of carbon by mass in this compound was found to be 30.27%.The complete combustion of 1.367 g this compound produces 1.765 g of sulfur dioxide(SO2) (i) Determine the empirical formula for this compound.(ii) If a sample of this compound having the mass 3.781 × 103 mg contains 9.528 × 10–3 molesof the compound, determine the molecular formula.arrow_forward
- The compound 2,3−dimercaptopropanol (HSCH2CHSHCH2OH), commonly known as British anti-Lewisite (BAL), was developed during World War I as an antidote to arsenic-containing poison gas. (a) If each BAL molecule binds one arsenic (As) atom, how many As atoms can be removed by 3.6 g of BAL? Enter your answer in scientific notation. (b) BAL can also be used to remove poisonous heavy metals like mercury (Hg) and lead (Pb). If each BAL binds one Hg atom, calculate the mass percent of Hg in a BAL-Hg complex. (An H atom is removed when a BAL molecule binds an Hg atom.)mass %arrow_forwardA compound is composed of carbon, hydrogen, nitrogen and oxygen. When a 1.500-g sample of the compound is completely combusted, it yields 1.476 g of CO2and 0.605 g of H2O. In a separate analysis to determine nitrogen, 1.500 g of the compound is found to produce 0.313 g of N2. (a) Calculate the mass percent of each element in the compound. (b) Determine the empirical formula of the compound. (c) If the compound has a molar mass of 134 g/mol, what is the molecular formula?arrow_forward6. This question refers to the compound aluminum sulfate octadecahydrate, Al2(SO4)3-18H₂O. Report your answers to parts (a)-(c) to 2 decimal places. (a) Calculate the formula weight. (b) What is the percent water in the compound? (c) What is the percent oxygen in the compound? (d) How many atoms of hydrogen are present in 1.00 g of the compound? Report your answer in scientific notation to 3 significant figures.arrow_forward
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