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Concept explainers
Interpretation:
The percentage composition, molecular formula and empirical formula of the compound have to be given.
Concept Introduction:
Empirical Formula:
The empirical formula of a compound is the simplest whole number ratio of each type of atom in a compound. It can be the same as the compound’s molecular formula but not always. An empirical formula can be calculated from information about the mass of each element in a compound or from the percentage composition.
The steps for determining the empirical formula of a compound as follows:
- Obtain the mass of each element present in grams.
- Determine the number of moles of each atom present.
- Divide the number of moles of each element by the smallest number of moles.
- Convert the numbers to whole numbers. The set of whole numbers are the subscripts in the empirical formula.
Molecular formula:
The molecular formula is the expression of the number of atoms of each element in one molecule of a compound if the molar mass value is known the molecular formula is calculated by the empirical formula.
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Chapter 7 Solutions
Foundations of College Chemistry, Binder Ready Version
- Write the calculate the reaction quotient for the following system, if the partial pressure of all reactantsand products is 0.15 atm: NOCl (g) ⇌ NO (g) + Cl2 (g) H = 20.5 kcalarrow_forwardComplete the spectroscopy with structurearrow_forwardcould you answer the questions and draw the complete mechanismarrow_forward
- Complete the spectroscopy with structurearrow_forwardCalculate the reaction quotient for the reaction:NaOH (s) ⇌ Na+ (aq)+ OH- (aq) + 44.4 kJ [Na+] = 4.22 M [OH-] = 6.41 Marrow_forwardGiven the following concentrations for a system, calculate the value for the reaction quotient: Cl2(g)+ CS2(g) ⇌ CCl4(g)+ S2Cl2(g) Cl2 = 31.1 atm CS2 = 91.2 atm CCl4 = 2.12 atm S2Cl2 = 10.4 atmarrow_forward
- Match each chemical or item with the proper disposal or cleanup mwthod, Not all disposal and cleanup methods will be labeled. Metal sheets C, calcium, choroide solutions part A, damp metal pieces Part B, volumetric flask part A. a.Return to correct lables”drying out breaker. Place used items in the drawer.: Rinse with deionized water, dry as best you can, return to instructor. Return used material to the instructor.: Pour down the sink with planty of running water.: f.Pour into aqueous waste container. g.Places used items in garbage.arrow_forwardWrite the equilibrium constant expression for the following reaction: HNO2(aq) + H2O(l) ⇌ H3O+(aq) + NO2-(aq)arrow_forwardWrite the reaction quotient for: Pb2+(aq) + 2 Cl- (aq) ⇌ PbCl2(s)arrow_forward
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