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Concept explainers
(a)
Interpretation:
The molar mass of
Concept Introduction:
The molar mass (M) of any atom, molecule or compound is the mass (in grams) of one mole of the substance. The molar mass of an element is numerically equal to its
(b)
Interpretation:
The molar mass of
Concept Introduction:
Refer to part a.
(c)
Interpretation:
The molar mass of
Concept Introduction:
Refer to part a.
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Chapter 3 Solutions
Chemistry: Principles and Practice
- Nitrogen fixation in the root nodules of peas and other legumes occurs with a reaction involving a molybdenum-containing enzyme named nitrogenase. This enzyme contains two Mo atoms per molecule and is 0.0872% Mo by mass. Calculate the molar mass of the enzyme.arrow_forwardWhich molecule has a molecular mass of 28.05 amu?arrow_forwardThe reaction between potassium chlorate and red phosphorus takes place when you strike a match on a matchbox. If you were to react 52.9 g of potassium chlorate (KCIO3) with excess red phosphorus, what mass of tetraphosphorus decaoxide (P4O10) could be produced? KClO3(s)+P4(s)P4O10(s)+KCl(s)(unbalanced)arrow_forward
- A sample of a hydrocarbon (a compound consisting of only carbon and hydrogen) contains 2.59 1023 atoms of hydrogen and is 17.3% hydrogen by mass. If the molar mass of the hydrocarbon is between 55 and 65 g/mol, what amount (moles) of compound is present, and what is the mass of the sample?arrow_forwardCalculate the molar mass of each of the following:(a) the anesthetic halothane, C2HBrClF3(b) the herbicide paraquat, C12H14N2Cl2(c) caffeine, C8H10N4O2(d) urea, CO(NH2)2(e) a typical soap, C17H35CO2Naarrow_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
- Calculate the formula mass for each compound. (a) CS2 (b) C6H12O6 (c) Fe(NO3)3 (d) C7H16arrow_forwardGive the empirical formula of each of the following compounds if a sample contains the following quantities of each element. (Type your answer using the format co2 for CO2.) (a) 0.0334 mol C, 0.1000 mol H, and 0.0167 mol o (b) 16.8 g C, 1.20 g H, and 6.40 g o (c) 54.5% C, 9.2% H, and 36.3% O by massarrow_forwardGive the empirical formula of each of the following compounds if a sample contains the following quantities of each element. (Type your answer using the format CO2 for CO2.) (a) 0.0130 mol C, 0.0390 mol H, and 0.0065 mol O(b) 20.0 g C, 3.4 g H, and 26.6 g O(c) 52.1% C, 13.1% H, and 34.7% O by massarrow_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_forwardCalculate each of the following quantities:(a) Total number of ions in 38.1 g of SrF₂(b) Mass in kilograms of 3.58 mol of CuCl₂.2H₂O(c) Mass in milligrams of 2.88x10^22 formula units of Bi(NO₃).35H₂Oarrow_forward(a) What is the mass, in grams, of 4.62 1023 molecules of aspirin, C9H8O4? (b) What is the molar mass of diazepam (Valium(R)) if 0.05570 mol weighs 15.86 g? g/mol (c) How many moles of ammonium ions are in 0.645 g of ammonium carbonate?arrow_forward
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