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1 CHEM 10113, Quiz 2 September 7, 2011 Name (please print) All answers must use the correct number of significant figures, and must show units! IA Periodic Table of the Elements VIIIA (1) (18) H IIA IIIA IVA VA VIA VIIA He (2) (13) (14) (15) (16) (17) Li Be B C N O F Ne Na Mg IIIB IVB VB VIB VIIB VIIIB IB IIB Al Si P S Cl Ar (3) (4) (5) (6) (7) (8) (9) (10) (11) (12) K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr Rb Sr Y Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I Xe Cs Ba La Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi Po At Rn Fr Ra Ac Rf Db Sg Bh Hs Mt Ds Uuu Uub Uug (261) (262) (266) (264) (270) (268) (281) 1. (3 points) Give ONE example of each of the following: a halogen Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu Th Pa U Np Pu Am Cm Bk Cf Es Fm Md No Lr an element in the same group as tungsten a metalloid an element that exists in nature as a diatomic molecule an element that readily forms a 2+ cation part of an atom found inside the nucleus 2. (5 points) Consulting the periodic table if needed (above), fill in the blanks to complete the table. Chemical symbol Z A p e- n Charge

2 3. (5 points) a) How many atoms of each element are represented in the following formula of tetrabutylammonium nitrate? (CH 3 CH 3 CH 3 CH 2 ) 4 N(NO 3 ) b) How many atoms of each element can be found in the products side of the following equation? Is the equation balanced? C 10 H 8(s) + 9 MnO 2(s) + H 2 SO 4(aq) C 8 H 6 O 4(s) + 2 CO 2(g) + MnSO 4(aq) + H 2 O (l) 4. (4 points) SHOW ALL WORK. Chlorine s mass in the periodic table is given as amu. It has two isotopes, A and B. Fill in the missing information about isotope B. Isotope Isotopic Abundance Isotopic Mass A 75.77% amu B?? 5. (1 point) If a 10 g sample of element X contains twice as many atoms as a 10 g sample of element Y, how does the atomic mass of X (mass X ) compare with the atomic mass of Y (mass Y )? 6. (1 point) How many moles of sulfur are there in 3.92 moles of Ca(S 2 O 3 ) 2? 7. (6 points) Upon hearing how many students would be in this class, Dr. Hanna began to hyperventilate. In 2 minutes she took 75 breaths of air. Given that each breath was 0.50 L, and that air contains 0.28 g of oxygen per liter, how many atoms of oxygen did Dr. Hanna inhale in those 2 minutes? 2

3 CHEM 10113, Quiz 2 September 7, 2011 Name (please print) All answers must use the correct number of significant figures, and must show units! IA Periodic Table of the Elements VIIIA (1) (18) H IIA IIIA IVA VA VIA VIIA He (2) (13) (14) (15) (16) (17) Li Be B C N O F Ne Na Mg IIIB IVB VB VIB VIIB VIIIB IB IIB Al Si P S Cl Ar (3) (4) (5) (6) (7) (8) (9) (10) (11) (12) K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr Rb Sr Y Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I Xe Cs Ba La Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi Po At Rn Fr Ra Ac Rf Db Sg Bh Hs Mt Ds Uuu Uub Uug (261) (262) (266) (264) (270) (268) (281) Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu Th Pa U Np Pu Am Cm Bk Cf Es Fm Md No Lr (3 points) Give ONE example of each of the following: a noble gas an element in the same group as platinum a metal an element that exists in nature as a diatomic molecule an element that readily forms a 1+ cation part of an atom found outside the nucleus 2. (5 points) Consulting the periodic table if needed (above), fill in the blanks to complete the table. Chemical symbol Z A p e- n Charge

4 3. (5 points) How many atoms of each element are represented in the following formula of sodium oleate? CH 3 (CH 2 ) 7 CHCH(CH 2 ) 7 COONa How many atoms of each element can be found in the products side of the following equation? Is the equation balanced? FeTiO 3(s) + 3 Cl 2(g) + 3 C (s) 3 CO (g) + FeCl 2(s) + TiCl 4(g) 4. (4 points) SHOW ALL WORK. Antimony s mass in the periodic table is given as amu. It has two isotopes, A and B. Fill in the missing information about isotope A. Isotope Isotopic Abundance Isotopic Mass A?? B 42.70% amu 5. (1 point) If a 20 g sample of element X contains twice as many atoms as a 20 g sample of element Y, how does the atomic mass of X (mass X ) compare with the atomic mass of Y (mass Y )? 6. (1 point) How many moles of nitrogen are there in 4.63 moles of Mg(NO 3 ) 2? 7. (6 points) Upon hearing how many students would be in this class, Dr. Hanna began to hyperventilate. In 2 minutes she took 102 breaths of air. Given that each breath was 0.50 L, and that air contains 0.28 g of oxygen per liter, how many atoms of oxygen did Dr. Hanna inhale in those 2 minutes? 4

5 CHEM 10113, Quiz 2 September 7, 2011 Name (please print) All answers must use the correct number of significant figures, and must show units! IA Periodic Table of the Elements VIIIA (1) (18) H IIA IIIA IVA VA VIA VIIA He (2) (13) (14) (15) (16) (17) Li Be B C N O F Ne Na Mg IIIB IVB VB VIB VIIB VIIIB IB IIB Al Si P S Cl Ar (3) (4) (5) (6) (7) (8) (9) (10) (11) (12) K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr Rb Sr Y Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I Xe Cs Ba La Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi Po At Rn Fr Ra Ac Rf Db Sg Bh Hs Mt Ds Uuu Uub Uug (261) (262) (266) (264) (270) (268) (281) Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu Th Pa U Np Pu Am Cm Bk Cf Es Fm Md No Lr (3 points) Give ONE example of each of the following: an alkali metal an element in the same group as tellurium a nonmetal an element that exists in nature as a diatomic molecule an element that readily forms a 2- anion the heaviest part of an atom 2. (5 points) Consulting the periodic table if needed (above), fill in the blanks to complete the table. Chemical symbol Z A p e- n Charge

6 3. (5 points) a) How many atoms of each element are represented in the following formula of heptamethyldisilazane? (CH 3 ) 3 SiN(CH 3 )Si(CH 3 ) 3 b) How many atoms of each element can be found in the products side of the following equation? Is the equation balanced? C 10 H 8(s) + 6 CrO 3(s) + H 2 SO 4(aq) C 8 H 6 O 4(s) + 2 CO 2(g) + 3 Cr 2 (SO 4 ) 3(aq) + H 2 O (l) 4. (4 points) SHOW ALL WORK. Boron s mass in the periodic table is given as amu. It has two isotopes, A and B. Fill in the missing information about isotope A. Isotope Isotopic Abundance Isotopic Mass A?? B 80.20% amu 5. (1 point) If a 5 g sample of element X contains twice as many atoms as a 5 g sample of element Y, how does the atomic mass of X (mass X ) compare with the atomic mass of Y (mass Y )? 6. (1 point) How many moles of nitrogen are there in 5.43 moles of Ca(NO 3 ) 2? 7. (6 points) Upon hearing how many students would be in this class, Dr. Hanna began to hyperventilate. In 2 minutes she took 86 breaths of air. Given that each breath was 0.50 L, and that air contains 0.28 g of oxygen per liter, how many atoms of oxygen did Dr. Hanna inhale in those 2 minutes? 6

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