MULTIPLE CHOICE 10-12 ONLY 5. Why are valence electrons important in identifying the group of an element ? BecauseA. valence electrons can be described as the innermost shell of an atomB. valence electrons described the location of the electrons in the outermost shell of an atomC. valence electrons remains to its orbitalsD. valence electrons are constant6. Unlike other noble gases, helium has two electrons. What makes helium a noble gas or stable element?A.. According to octet rule, helium completed its electron on the outer shellB. Helium belongs to group 8AC. According to octet rule, helium is a non-metalD. According to Hund's helium occupied 1 box with 2 max electrons7. Which of the following has a molecular geometry of tetrahedral?B. CCl,F2D. C20С. CS28. In which compound is hydrogen bonding found?A. ammonia B. carbonic acidA. SF2C. dolomiteD. sodium chloride9. How can a molecule become nonpolar if it contains polar bonds?A. If the molecules has a symmetrical geometry and has all bonds are the same, the bond dipolescancel and the molecule is non polar.B. If the atoms are C or H onlyC. If the atoms have big electronegativity difference but are linearD. If atoms are not belong to the noble gases10. Many organic solvents boil below 200 °C because of covalent bonding, while solids, such as copper,do not melt until thousands of °C because the atoms formA. hydrogen bondB. polar bond11. Which statement is correct about Isomerism?C. IONIC BONDvi D. NONPOLAR bondA. They differ in both physical and chemical properties.B. They have the different molecular formula.C. Chain isomers differ in the arrangement of their skeletonD. They have the same molecular formula.12. What reaction takes place when a substance reacts with oxygen gas, releasing energy in the form of light andheat?C. CombustionD. SaponificationA. Addition200 1B. Condensation13. Which of the following would undergo addition reactions?A. halogenB. alkyne14.Which of the following organic compound will form when a carboxylic acid and an alcohol undergoC. alkaneD. alcoholcondensation reaction?A. new C-C bondC. new N-O bondB. new O-C bondD. ester15. Which of the following types of reaction happens when alkene reacts with water yields in the production ofalcohol?A. SaponificationB. CondensationC. CombustionD. Addition

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D. If atoms are not belong to the noble gases 10. Many organic solvents boil below 200 °C because of covalent bonding, while solids, such as copper, do not melt until thousands of °C because the atoms form C. IONIC BOND D. NONPOLAR bond A. hydrogen bond B. polar bond 11. Which statement is correct about Isomerism? A. They differ in both physical and chemical properties. B. They have the different molecular formula. C. Chain isomers.differ in the arrangement of their skeleton D. They have the same molecular formula. 12. What reaction takes place when a substance reacts with oxygen gas, releasing energy in the form of light and heat? A. Addition C. Combustion B. Condensation D. Saponification

D. If atoms are not belong to the noble gases 10. Many organic solvents boil below 200 °C because of covalent bonding, while solids, such as copper, do not melt until thousands of °C because the atoms form C. IONIC BOND D. NONPOLAR bond A. hydrogen bond B. polar bond 11. Which statement is correct about Isomerism? A. They differ in both physical and chemical properties. B. They have the different molecular formula. C. Chain isomers.differ in the arrangement of their skeleton D. They have the same molecular formula. 12. What reaction takes place when a substance reacts with oxygen gas, releasing energy in the form of light and heat? A. Addition C. Combustion B. Condensation D. Saponification

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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I know you don't answer graded questions and I am not looking for you to straight up give me the answer to this but how do I even start? like I said before I know that the highest peak is 16amu which is Oxygen but do I just the vertical bar as a ratio? Like the next bar to the left (15amu?) is like 90% intensity? so like 9:10 ratio? There isn't even a 15amu element so please just give me some idea where to start. The place in the book it tells you to go to read has nothing about this stuff, its about finding empirical formulas from mass or percentages.... please help me!
Question 4
I need help with finding the distance component moved and distance solvent moved
1-7 pls answer 2 or more
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PhH₂CO HO H3O+ 1. H₂, Pd/C 2. H3O+ ethylene glycol pTSA
Mode of separation that uses a polar stationary phase: IEX HILIC SEC NPLC
Analysis was run on samples from a known CRM with 8.85% Fe. The following results for %Fe were obtained by an analyst: 8.75, 8.51, 8.25, 8.61. Which of the following statements is true assuming none of the data points are outliers? Group of answer choices Tcalc = 63.15 The analysis is not accurate at the 95% confidence interval. Tcalc = 3.03 The analysis is accurate at the 95% confidence interval. Not enough information to determine Tcalc = 63.15 The analysis is accurate at the 95% confidence interval. Tcalc = 3.03 The analysis is not accurate at the 95% confidence interval.
ch1
2. Run V (NH4)2S₂08 (mL) 20.00 20.00 10.00 5.00 20.00 15.00 1 2 3 4 5 6 [S₂082-] (mol/L) 0.04 0.04. 0.02 0.01 10.09 10.03. VKI (mL) 20.00 10.00 20.00 20.00 8.00 15.00 [1-] (mol/L) 0.08 0.07 0.08 0.08 0.032 V Na₂S₂03 (mL) 10.00 10.00 10.00 10.00 10.00 10.00 [S₂032-] (mol/L) 6.001 0.001 0.001 10.001 0.001 0.001 These calculated concentrations should be entered in the Data Table for this experiment for runs 1-6. To calculate the concentration of [12], use Equation (3) and the concentration of [S₂03²]. In a constant-temperature run described in the procedure section of this experiment, the solution turned blue in 50 s. a) Consider the concentration of [S₂032] in the mixed solution shown in the las column of the table from the previous exercise. Calculate the concentration c [12] final formed in this reaction. b) Calculate the rate of the reaction.
The Ksp of A3B2 = 1.04x10^-23.What is its solubility in water? a. 1.0x10-5M b. 5.6x10-7M c. 1.04x10-23M d. 3.1x10-13M
Which of the following is the reagent used for lead-sulfide test? * potassium dichromate (K₂Cr₂O₇) copper (II) sulfate (CuSO₄) lead acetate (Pb(C₂H₃O₂)₂) ethyl alcohol (C₂H₅OH)