Carbon, nitrogen, and oxygen have atomic numbers of 6, 7, and 8.  How many neutrons are in their nuclei, and what are their atomic masses for the most common isotopes?     6, 7, and 8 neutrons for atomic masses 12, 14, and 16     7, 8, and 9 neutrons for atomic masses 13, 15, and 17     8, 9, and 10 neutrons for atomic masses 14, 16 and 18     no neutrons for atomic masses 6, 7, and 8

Q: dioxide is reacted with 50.0 g of oxygen. The reaction proceeds until one reactant is Sulfur dioxide…

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Q: Which two functional groups are in the molecule shown below? Use the terms left and right to…

A: Identify functional group present in the structure --

Q: 29, An electron in the hydrogen atom make a transition from the ground state to an excited level by…

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Q: For a galvanic cell constructed using a graphite cathode and a graphite anode : 5Sn²+ aq) + 2MnO4…

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Q: For For the reaction: NH:CO,NH2) + 2NHg) + CO2 g) .Drive the relationship between Kp and Kc ?

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Q: Calculate the average value of r in a hydrogen 1s orbital.

A: We have to calculate the average value of r in a hydrogen 1s orbital.

Q: Given for nos. 10-11: In an acid-base titration, you were given with a 0.1050 M sodium hydroxide…

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Q: 47. Of the elements shown in the Periodic Table, which is the most reactive? * III IV V VI VI| Ne I…

A: 47. We need to determine most reactive element.  48. We need to tell the non metal in group 1.  49.…

Q: Activity 1. Lewis Structures Instructions: Draw a Lewis structure for: (a) H,S, (b) OF2, (c)…

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Q: Suppose 2.94g of H2 and 2.34g of He are trapped in 2.65L container at standard temperature.…

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Q: The Merrifield solid phase synthesis is commercially used for the production of peptides. Identify…

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Q: Calculate ΔG for the following cell reaction:  3Zn(s) + 2Cr3+(aq) ⇌ 3Zn2+(aq) + 2Cr(s)       where…

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Q: Consider the titration of 100.0 mL of 0.100 M NaOH with 1.00 M HBr. Find the pH at the following…

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Q: so what is the answer whcih later

A: To provide the answer.

Q: 15-10. Suppose that the Ag | AgCl outer electrode in Figure 15-7 is filled with 0.1 M NaCl instead…

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Q: mass (in grams) of magnesium oxide

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Q: A Оз Zn/CH3COOH Br2 F H20 H2 В Pd HCI H20

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Q: Given for nos. 1-2: The pH of a swimming pool was measured at 6.10. 1. What is its pOH? Answer:…

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Q: What effect will happen to the volume needed to reach bromocresol green end point, if Na2CO3 was…

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Q: The chemical formulae of some acids are listed in the first column of the table below, and in the…

A: Acid                                     Strong or WeakH3PO4…

Q: Consider the following reaction: H2(g)+I2(g)-->2HI(g) Given the following data: H2: delta H*= 0…

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Q: The reaction of 1-bromopropane with sodium iodide gives 1- iodopropane. What is the effect of…

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Q: 20 centimeters cubed of solution containing 1.0g of sodium hydroxide per 250 centimeters cubed of…

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Q: Me Pd Me Pd + A C PPH2 Ph-P PPH2 Fe PPH2 PPH2 PPH2 - 99 -91 - 110 "bite angle" B.

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Q: True or false. The electronic absorption spectrum of a complex when there is the excitation of a…

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Q: What is the boiling point of a solution prepared by dissolving 251 g of octasulfur (Sg, Molar mass =…

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Q: Consider the titration of 100.0 mL of 0.10OM NAOH with 1.00 M HBr. Find the pH at the following…

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Q: Balance the following equations and express the rate of the following reactions in terms of the…

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Q: 1. Which state of matter has a definite shape and volume ? * a. gas b. liquid C. solid d. both…

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Q: what is bisphenol A

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Q: A 5ml ampoule of a 1 in 200,000 solution of bupivacaine hydrochloride is administered to a patient.…

A: 1 in 200,000 solution means 1 g of solute in 200,000 mL of solution.

Q: Question 15 A solution is prepared by placing 13 moles of KBr in 1.9 kg of water. What is the…

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Q: Which is more acidic? 0.010M HNO3 or 0.0010M HCl? a.HNO3 b.HCl

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Q: je mass percent of a sucrose solution

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Q: 16 A Review Fifth member of the homologous series having general formula CnH2n-2 is Only One Correct…

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Q: Convert the 98% T to absorbance: a. 0.008 b. 0.08 c. 0.021 d. 0.21

A: A (absorbance) = - logT  T = transmittance... Rule,   A = 2 - log (T%)  Given T% = 98

Q: Part B A310 ml sample of a KOH solution of unknown concentration requires 12.1 ml of 0. 100 M H,SO,…

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Q: Calculate the percent dissociation of trimethylacetic acid (C,H,CO,H) in a 0.52 mM aqueous solution…

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Q: What is the concentration of the undiluted chloride solution? Round off to three (3) significant…

A: Given that -  Mass of sample containing chlorides ions = 400 g  Molar weight of chloride ion = 35.45…

Q: III. The initial rates for the reaction of hydrogen and nitrogen: 3H2 (g)t N2 (g) → 2NH3 (g) were…

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Q: The scale of a spectrophotometer extends from 1 to 100% T, what are the values of these two extremes…

A: A = -log(T) A = log(1/T) A = log[100/T(%)] A = 2-log[T(%)]

Q: Determine the name of this molecule shown below. Br #2 (Ketono) "5,6-dibromoheptane" Br

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Q: Following the procedure, a student recorded the initial volume of sodium hydroxide in his buret as…

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Q: 10. Some of the reported chemical concentrations of water at the pH 7.3 are the following: [Na"] =…

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Q: The concentration of FE2+  in a saturated solution of FeS is 6.38*10^(-10) mol/L at a certain…

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Q: 47. Of the elements shown in the Periodic Table, which is the most reactive? III IV V VI VII I I Li…

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Q: When 6.50 g of a certain molecular compound X are dissolved in 65. g of benzonitrile (C,H,CN). the…

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Q: A student proposed two ball-and-stick models (see the image) for the XeF4 molecule, however, only…

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Q: I. 1. Cr,O, → Cr³* 2. NO → NO; 3. SO, 2 → SO2 4. MnO, → Mn,O, Balance each half reaction in basic…

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Group 14 Elements

The following elements come under group 14 of the periodic table.