1A 8A H 2A 3A 4A SA 6A 7A He BCNOF Ne Li Be 1B 2B ASi P S CI Ar Na Mg 3B 4B 58 6B 7B 88 K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr Rb Sr Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te Xe Cs Ba La Hf Ta wRe Os Ir Pt Au Hg TI Pb Bi Po At Rn Fr Ra Ac Rf Ha Ce Pr Nd P Sm Eu 6d Tb Dy Ho Er Im Yb Lu Th Pa U Np Pu Am Cm Bk Cf Es Fm Md No Lr () What is the name of the element with a valence electron configuration of 4s24p4? (2) What is the name of the element with a valence electron configuration of 3s23p2?

1A 8A H 2A 3A 4A SA 6A 7A He BCNOF Ne Li Be 1B 2B ASi P S CI Ar Na Mg 3B 4B 58 6B 7B 88 K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr Rb Sr Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te Xe Cs Ba La Hf Ta wRe Os Ir Pt Au Hg TI Pb Bi Po At Rn Fr Ra Ac Rf Ha Ce Pr Nd P Sm Eu 6d Tb Dy Ho Er Im Yb Lu Th Pa U Np Pu Am Cm Bk Cf Es Fm Md No Lr () What is the name of the element with a valence electron configuration of 4s24p4? (2) What is the name of the element with a valence electron configuration of 3s23p2?

Chemistry: An Atoms First Approach

2nd Edition

ISBN:9781305079243

Author:Steven S. Zumdahl, Susan A. Zumdahl

Publisher:Steven S. Zumdahl, Susan A. Zumdahl

Chapter1: Chemical Foundations

Section: Chapter Questions

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

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Define and e xplain the differences between the following terms. a. law and theory b. theory and experiment c. qualitative and quantitative d. hypothesis and theory
Consider the following data for three binary compounds of hydrogen and nitrogen: %H (by Mass) %N (by Mass) I 17.75 82.25 II 12.58 87.42 III 2.34 97.66 When 1.00 L of each gaseous compound is decomposed to its elements, the following volumes of H2(g) and N2(g) are obtained: H2(L) N2(L) I 1.50 0.50 II 2.00 1.00 III 0.50 1.50 Use these data to determine the molecular formulas of compounds I, II, and III and to determine the relative values for the atomic masses of hydrogen and nitrogen.
F2(g)+2e-→2F-(aq) 2.866 O3(g)+2H+(aq)+2e-→O2(g)+H2O(l) 2.076 Co3+(aq)+e-→Co2+(aq) 1.92 H2O2(aq)+2H+(aq)+2e-→2H2O(l) 1.776 Ce4+(aq)+e-→Ce3+(aq) 1.72 Au+(aq)+e-→Au(s) 1.692 PbO2(s)+4H+(aq)+SO42-(aq)+2e-→PbSO4(s)+2H2O(l) 1.691 MnO4-(aq)+8H+(aq)+5e-→Mn2+(aq)+4H2O(l) 1.507 Au3+(aq)+3e-→Au(s) 1.498 Cr2O72-(aq)+14H+(aq)+6e-→2Cr3+(aq)+7H2O(l) 1.36 Cl2(g)+2e-→2Cl-(aq) 1.358 O2(g)+4H+(aq)+4e-→2H2O(l) 1.229 MnO2(s)+4H+(aq)+2e-→Mn2+(aq)+2H2O(l) 1.224 2IO3-(aq)+12H+(aq)+10e-→I2(s)+6H2O(l) 1.195 Br2(l)+2e-→2Br-(aq) 1.066 VO2+(aq)+2H+(aq)+e-→VO2+(aq)+H2O(l) 0.991 HNO2(aq)+H+(aq)+e-→NO(g)+H2O(l) 0.983 NO3-(aq)+4H+(aq)+3e-→NO(g)+2H2O(l) 0.957 2Hg2+(aq)+2e-→Hg22+(aq) 0.92 Hg2+(aq)+2e-→Hg(l) 0.851 Ag+(aq)+e-→Ag(s) 0.800 Hg22+(aq)+2e-→2Hg(l) 0.797 Fe3+(aq)+e-→Fe2+(aq) 0.771 O2(g)+2H+(aq)+2e-→H2O2(aq) 0.695 MnO4-(aq)+2H2O(l)+3e-→MnO2(s)+4OH-(aq) 0.595 I2(s)+2e-→2I-(aq) 0.536 Cu+(aq)+e-→Cu(s) 0.521 O2(g)+2H2O(l)+4e-→4OH-(aq)…
Calculate the mass of Cu in g from 8.20 kg CuFeS2
Am I right? Calculate the mass percentage of water in the hydrate. Show the calculations. Sample 1 : 60.87% Mass of hydrate : 0.46g Mas of water : 0.28g Mass percentage of water in the hydrate = 0.28g/0.46g x 100 = 60.87% Sample 1 2 3 Calculations for sample 1 Mass of aluminum dish 1.24g 1.26g 1.24g - Mass of aluminum dish + Epsom salt 1.70g 1.94g 1.80g - Epsom salt, original (hydrated) mass 0.46g 0.68g 0.56g 1.70g – 1.24g = 0.46g Mass of aluminum dish + Epsom salt after heating 1.42g 1.62g 1.61g Epsom salt, heated (dehydrated) mass 0.18g 0.36g 0.37g 1.42g- 1.24g = 0.18g Mass of water 0.28g 0.32g 0.19g 0.46g – 0.18g = 0.28g Moles of magnesium sulfate 0.0015mol 0.0030mol 0.0031mol 0.18g x (1mol/120.37g)= 0.0015mol Moles of water 0.016mol 0.018mol 0.011mol 0.28g x (1mol/18.02g) = 0.016mol Ratio of moles water: moles of magnesium sulfate 32:3 18:3 11:3.1…
Ecell Mg‎2+(aq) + 2 e- -> Mg(s) Mg2 + |M‎g = - 2.372 Sn4‎+(aq) + 2 e- -> S‎n2+(aq) Sn2 + , Sn4 + |Pt = + 0.154 Cl‎2 (g) + 2 e- -> 2 Cl-(‎aq Cl-| Cl2 |Pt = +1.‎36 Whic‎h of the follo‎wing is best reduc‎ing ag‎ent for Cl2(g)? a. Mg‎(s) b. Mg‎2+(aq c. Sn4‎+(aq) d. Sn2‎+(aq
1. The radius of a rhodium atom is 134 pm. How many rhodium atoms would have to be laid side by side to span a distance of 1.70 mm? 2. The mass of a single uranium atom is 4.70×10-22 grams. How many uranium atoms would there be in 196 milligrams of uranium?
Mass of crucible and cover 12.73g 2. Mass of crucible, cover, and sample 24.11g 3. Mass of original sample 24.11- 12.73g= 11.97g 4. Mass of crucible, cover, and sample after 1st heating 20.01g 6. Mass of crucible, cover, and sample after 2nd heating (assume that this step was done) 19.98 g 7. Total mass lost by sample during heating what is the percentage of water in the sample? and what is the total mass lost by the sample?
In an experiment, 0.237 g of zinc metal reacts to produce 0.501 g of zinc oxide. Using the Law of conservation of mass, predict the mass of the reacting oxygen gas. 2 Zn(s) + O2(g)--> 2 ZnO(s) A) 0.264 g B) 1.468 g C) 0.160 g D) 0.738 g E) 0.040 g
Naturally occurring cobalt consists of only one isotope, 59Co , whose relative atomic mass is 58.9332. A synthetic radioactive isotope of cobalt, 60Co , relative atomic mass 59.9338, is used in radiation therapy for cancer. A 1.7320 g sample of cobalt has an apparent "atomic mass" of 58.9901. Find the mass of 60Co in this sample. Express your answer with the appropriate units. Express no of atoms using four significant figures 21.899 g Cr 46.347 gS 12.360 g Pt 96.471 g Sn
a. What is the mass of sulphur that contains the same number of atoms as 8.1 g of magnesium? (Relative atomic masses: Mg = 24.3, S = 32.1) A. 5.35 g B. 10.7 g C. 16.0 g D. 21.4 g b. If 2.4 g of oxygen contains x atoms, how many atoms are there in 12.0 g of helium (He)? (Relative atomic masses: He = 4.0, O = 16.0) 10x 20x 30x 40x c. Which of the following samples of gases contains the greatest number of atoms? (Relative atomic masses: H = 1.0, C = 12.0, Cl = 35.5, Ar = 40.0) 10.0 g of Cl2 11.0 g of Ar 12.0 g of HCl 13.0 g of C2H6
8) Elements A and Q form two compounds. The ratio (mass Q)/(mass A) for compound one is 0.271 and ratio (mass Q)/(mass A) for compound two is 0.362. If compound one has the chemical formula AQ, what is the chemical formula for compound two? a) AQ3 b) A2Q3 c) AQ2 d) A3Q4

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