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Concept explainers
(a)
Interpretation: Empirical formula of compound that has 0.039 mol Fe and 0.052 mol O should be determined.
Concept introduction:An empirical formula depicts the ratio of simplified whole-number of atoms contained in a molecule. The molecular formula depicts exact number of each atom found in a molecule.
The steps to determine empirical formula are stated as follows:
Divide mass of element by its molar mass to convert mass to moles as follows:
Amount(mol)=(Given mass(g))(1 molNo. of grams)
Number of moles thus calculated is written as subscript of element’s symbol and this results in a preliminary empirical formula.
In order to convert the moles to the whole number subscripts, each subscript is divided by the smallest subscript. Finally, empirical formula can be simply written from the molar ratio of each element specified at the superscript of each symbol present in the compound.
(b)
Interpretation: Empirical formula of compound that has 0.903 g P and 6.99 g Br should be determined.
Concept introduction:An empirical formula depicts the ratio of simplified whole-number of atoms contained in a molecule. The molecular formula depicts exact number of each atom found in a molecule.
The steps to determine empirical formula are stated as follows:
Divide mass of element by its molar mass to convert mass to moles as follows:
Amount(mol)=(Given mass(g))(1 molNo. of grams)
Number of moles thus calculated is written as subscript of element’s symbol and this results in a preliminary empirical formula.
In order to convert the moles to the whole number subscripts, each subscript is divided by the smallest subscript. Finally, empirical formula can be simply written from the molar ratio of each element specified at the superscript of each symbol present in the compound.
(c)
Interpretation: Empirical formula of the compound that has 79.9 % C should be determined.
Concept introduction:An empirical formula depicts the ratio of simplified whole-number of atoms contained in a molecule. The molecular formula depicts exact number of each atom found in a molecule.
The steps to determine empirical formula are stated as follows:
Divide mass of element by its molar mass to convert mass to moles as follows:
Amount(mol)=(Given mass(g))(1 molNo. of grams)
Number of moles thus calculated is written as subscript of element’s symbol and this results in a preliminary empirical formula.
In order to convert the moles to the whole number subscripts, each subscript is divided by the smallest subscript. Finally, empirical formula can be simply written from the molar ratio of each element specified at the superscript of each symbol present in the compound.
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Chapter 3 Solutions
Principles of General Chemistry
- Q10: (a) Propose a synthesis of C from A. (b) Propose a synthesis of C from B. Br Br ...\SCH 3 A B Carrow_forward9: Complete the missing entities for following reactions (e.g., major product(s), reactants, and/or solvents) for the SN2 reactions to occur efficiently. Include curved-arrow mechanism for reactions a) to d).arrow_forwardComplete the missing entities for following reactions (e.g., major product(s), reactants, and/or solvents) for the SN2 reactions to occur efficiently. Include curved-arrow mechanism for reactions a) to d).arrow_forward
- QUESTION 3: Provide the synthetic steps that convert the starting material into the product (no mechanism required). HO OH NH CH3 multiple steps 요요 H3Carrow_forwardQ6: Predict the effect of the changes given on the rate of the reaction below. CH3OH CH3Cl + NaOCH3 → CH3OCH3 + NaCl a) Change the substrate from CH3CI to CH31: b) Change the nucleophile from NaOCH 3 to NaSCH3: c) Change the substrate from CH3CI to (CH3)2CHCI: d) Change the solvent from CH3OH to DMSO.arrow_forwardQ3: Arrange each group of compounds from fastest SN2 reaction rate to slowest SN2 reaction rate. a) CI Cl فيكم H3C-Cl A B C D Br Br b) A B C Br H3C-Br Darrow_forward
- Q2: Group these solvents into either protic solvents or aprotic solvents. Acetonitrile (CH3CN), H₂O, Acetic acid (CH3COOH), Acetone (CH3COCH3), CH3CH2OH, DMSO (CH3SOCH3), DMF (HCON(CH3)2), CH3OHarrow_forwardSuppose the rate of evaporation in a hot, dry region is 1.76 meters per year, and the seawater there has a salinity of 35 ‰. Assuming a 93% yield, how much salt (NaCl) can be harvested each year from 1 km2 of solar evaporation ponds that use this seawater as a source?arrow_forwardhelparrow_forward
- Explain why only the lone pairs on the central atom are taken into consideration when predicting molecular shapearrow_forward(ME EX1) Prblm #9/10 Can you explain in detail (step by step) I'm so confused with these problems. For turmber 13 can u turn them into lewis dot structures so I can better understand because, and then as well explain the resonance structure part. Thanks for the help.arrow_forwardProblems 19 and 20: (ME EX1) Can you please explain the following in detail? I'm having trouble understanding them. Both problems are difficult for me to explain in detail, so please include the drawings and answers.arrow_forward
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