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1) The number with the most significant zeros is A) 250000001 B) 0.00002510 C) 2.5100000 D) 0.02500001 E) 2.501 x 10-7

1) The number with the most significant zeros is A) 250000001 B) 0.00002510 C) 2.5100000 D) 0.02500001 E) 2.501 x 10-7

Introductory Chemistry: A Foundation
Introductory Chemistry: A Foundation
9th Edition
ISBN:9781337399425
Author:Steven S. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Donald J. DeCoste
Chapter15: Solutions
Section: Chapter Questions
Problem 38CR
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general chemistry , please solve question 1

1) The number with the most significant zeros is A) 250000001 B) 0.00002510 C) 2.5100000 D) 0.02500001 E) 2.501 x 10-7 2) The correct name for HNO2 is, C) nitric acid E) hydrogen nitrate A) nitrous acid B) pernitric acid D) hyponitrous acid 3) Calculate the percentage by mass of hydrogen in PICI2(NH3)2. A) 1.008 B) 0.034 C)1.558 D) 0.672 E) 2.016 4) What mass in grams of hydrogen is produced by the reaction of 4.73 g of magnesium with 1.83 g of water? Mg (s) + 2H20 (1) - Mg(OH)2 (s) + H2 (g) A) 0.102 B) 0.204 C) 0.0485 D) 0.219 E) 0.0162 5) How many moles of Nat are present in 343 ml. of a 1.27 M solution of Na2SO4? A) 1.31 B) 0.436 C) 0.871 D) 11.1 E) 3.70 6) Which of the following is not part of the kinetic-molecular theory? A) Atoms are neither created nor destroyed by ordinary chemical reactions. B) The volume occupied by all of the gas molecules in a container is negligible compared to the volume of the containe C) Gases consist of molecules in continuous, random motion. D) Collisions between gas molecules do not result in the loss of energy. E) Attractive and repulsive forces between gas molecules are negligible. 7) The value of AH° for the reaction below is-72 kJ. H2 (g) + Br2 (g) kJ of heat are released when 80.9 grams of HBr is form this reaction. + 2HBR (g) B) 0.44 C) 72 D) 36 E) 144 A) -72 8) Which one of the following is not a valid value for the magnetic quantum number of an electron in a 5d subshell C)3 D)-1 E) 0 A) 1 B) 2 9) Of the following, which gives the correct order for atomic radius for Mg, Na, P, Si and Ar? A) Si > P > Ar > Na > Mg B) Na > Mg > Si > P > Ar C) Ar > P > Si > Mg > Na D) Ar > Si > P > Na > Mg E) Mg > Na > P > Si > Ar 10) Of the choices below, which gives the order for first ionization energies? A) Ga > Ge > Se > Br > Kr B) Kr > Se > Br > Ga > Ge C) Ga > Br > Ge > Kr > Se D) Kr > Br > Se > Ge > Ga E) Br > Se > Ga > Kr > Ge 1
Transcribed Image Text:1) The number with the most significant zeros is A) 250000001 B) 0.00002510 C) 2.5100000 D) 0.02500001 E) 2.501 x 10-7 2) The correct name for HNO2 is, C) nitric acid E) hydrogen nitrate A) nitrous acid B) pernitric acid D) hyponitrous acid 3) Calculate the percentage by mass of hydrogen in PICI2(NH3)2. A) 1.008 B) 0.034 C)1.558 D) 0.672 E) 2.016 4) What mass in grams of hydrogen is produced by the reaction of 4.73 g of magnesium with 1.83 g of water? Mg (s) + 2H20 (1) - Mg(OH)2 (s) + H2 (g) A) 0.102 B) 0.204 C) 0.0485 D) 0.219 E) 0.0162 5) How many moles of Nat are present in 343 ml. of a 1.27 M solution of Na2SO4? A) 1.31 B) 0.436 C) 0.871 D) 11.1 E) 3.70 6) Which of the following is not part of the kinetic-molecular theory? A) Atoms are neither created nor destroyed by ordinary chemical reactions. B) The volume occupied by all of the gas molecules in a container is negligible compared to the volume of the containe C) Gases consist of molecules in continuous, random motion. D) Collisions between gas molecules do not result in the loss of energy. E) Attractive and repulsive forces between gas molecules are negligible. 7) The value of AH° for the reaction below is-72 kJ. H2 (g) + Br2 (g) kJ of heat are released when 80.9 grams of HBr is form this reaction. + 2HBR (g) B) 0.44 C) 72 D) 36 E) 144 A) -72 8) Which one of the following is not a valid value for the magnetic quantum number of an electron in a 5d subshell C)3 D)-1 E) 0 A) 1 B) 2 9) Of the following, which gives the correct order for atomic radius for Mg, Na, P, Si and Ar? A) Si > P > Ar > Na > Mg B) Na > Mg > Si > P > Ar C) Ar > P > Si > Mg > Na D) Ar > Si > P > Na > Mg E) Mg > Na > P > Si > Ar 10) Of the choices below, which gives the order for first ionization energies? A) Ga > Ge > Se > Br > Kr B) Kr > Se > Br > Ga > Ge C) Ga > Br > Ge > Kr > Se D) Kr > Br > Se > Ge > Ga E) Br > Se > Ga > Kr > Ge 1
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