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(a)
Interpretation:
The number of protons for the isotopes of oxygen that has mass numbers 16, 17 and 18 should be determined.
Concept Introduction:
The number of protons indicates the
(b)
Interpretation:
The number of neutrons for the isotopes of oxygen that has mass numbers 16, 17 and 18 should be determined.
Concept Introduction:
The number of neutrons along with number of protons indicates the mass number. The neutrons are neutrally charged particles and do not contribute to the charge of the atom on whole.
(c)
Interpretation:
The number of electrons for the isotopes of oxygen that has mass numbers as 16, 17 and 18 in its neutral state should be determined.
Concept Introduction:
The mass number is the total number of protons and neutrons present in the nucleus. But it is also known that number of electrons is equal to the number of protons to keep the atom neutral.
(d)
Interpretation:
The group number for the isotopes of oxygen that has mass numbers 16, 17 and 18 should be determined.
Concept Introduction:
The group number is indicated by the atomic number of the element. Atomic number is influenced by the number of protons in the nucleus.
(e)
Interpretation:
The symbol of the isotopes of oxygen that has mass numbers 16, 17 and 18 should be determined with its subscripts and superscripts.
Concept Introduction:
The isotope of any element is indicated by its atomic number and mass number. Both the numbers are displayed along with the element. The mass number is displayed as superscript while the atomic number is displayed as subscript as shown:
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Chapter 2 Solutions
EBK GENERAL, ORGANIC, & BIOLOGICAL CHEM
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- What is the average mass of the 10 pennies? Report your value with correct significant figures. What is the error (uncertainty) associated with each mass measurement due to the equipment? What is the uncertainty associated with the average value? Note that the uncertainty of the balance will propagate throughout the calculation. What is the standard deviation of the 10 mass measurements? Explain the difference between the propagated uncertainty and the standard deviation. Which number would you use to describe the uncertainty in the measurement? Calculate the total mass of the pennies with associated uncertainty. Calculate the average density of a penny based on these data. Propagate the uncertainty values for both mass and volume in your calculations.arrow_forwardCan you help me and explain the answers please.arrow_forwardB 1 of 2 Additional problems in preparation to Midterm #1: 1.) How can the following compounds be prepared using Diels-Alder reaction: CH3 O CN (a) (b) CN CH3 2.) What is the missing reagent in the shown reaction? H3C + ? H3C H3C CN H3C ''CN (၁) H 3.) Write the products 1,2-addition and 1,4-addition of DBr to 1,3-cyclohexadiene. Remember, D is deuterium, a heavy isotope of hydrogen. It reacts exactly like hydrogen. 4.) In the shown reaction, which will be the kinetic product and which will be the thermodynamic product? H3C CI H3C HCI H3C + 5.) Which of the following molecules is aromatic? (a) (b) (c) H 6.) Which of the following molecules is aromatic? (a) (b) (c) 7.) Write the mechanism for the shown reaction. + Ха AICI 3 CI 8.) Suggest reagents that would convert benzene into the shown compounds. CI NO2 -8-6-6-8-a (a) (b) (c) (d) (e) (a) SO3H Brarrow_forward
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- Which one of the following functional groups is not present in thecompound shownA. amine; B. aldehyde, C. ether; D. amide. E. ketonearrow_forwardWhich of the following formulas correspond to at least one compound inwhich resonance is important?w. C2H5N x. C3H5Br; y. C3H4; z. C4H6.A. w, x, y; B. x, y, z; C. w, x, z; D. w, y, z; E. all of themarrow_forwardPredict the product(s) that are formed after each step for reactions 1-4. In each case, consider formation of any chiral center(s) and draw all expected stereoisomers. 1) OH 1) HBr (SN2) 2) NaOH, heat 3) BH3, THF 4) H2O2, NaOH 2) OH 1) SOCI 2, py 2) NaOEt 3) Br2, H₂O 3) OH 1) H2SO4 conc. 2) HBr, ROOR 3) KOtBu 4) OH 1) TsCl, py 2) NaOEt 3) 03 4) DMSarrow_forward
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