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rctc d2l

rctc d2l

Description

School: Rochester Community and Technical College
Department: Chemistry
Course: General, Organic, and Biological Chemistry I
Professor: Teresa brown
Term: Spring 2016
Tags:
Cost: 50
Name: Monday First Test
Description: Read Chapters 1-2. Practice Online Homework on Chem Connect. Review questions at the end of each chapter. Complete Competency One on D2L. You should be ready! Need more help? Look for announcements for study groups- Friday at 11am-Noon and 1pm-2pm in Singley Hall, Room 210. Possibly others over the weekend. Checkout the Learning Center for personal assistance with questions.
Uploaded: 08/22/2017
11 Pages 116 Views 0 Unlocks
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_____ 12) What is the name given to the element with the symbol Se?




_____ 11) What is the chemical symbol for iron?




_____ 1) How would you classify seaweed in salt water?



Exam 1 Outline  Chapter 1 • Know the 3 common states of matter. • Know the difference between chemical and physical properties of matter. • Know the difference between a chemical change and a physical change. • Know the differences between an element, compound, heterogeneous and homogeneous  miDon't forget about the age old question of ivy tech comm college
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xtures. • Know metric prefixes/conversions (kilo, deci, centi, milli, and micro). • Know the terms accuracy and precision. • Know how to take measurements on an instrument (ruler, balance, graduated cylinder). • Know the rules for determining the number of significant figures. o Know how to round. o Know the Multiplication/Division vs. Addition/Subtraction operational rules for  significant figures. • Know how to solve dimensional analysis problems. • Know and understand the term density. o Know how to determine the density of a piece of matter given its mass and volume. o Know how to use density as a conversion factor to find mass or volume. • Know how to convert between the different temperature scales given the formulas. Chapter 2 • Know the names and symbols of elements 1-36. • Know the common subatomic particles of an atom. • Know how protons, electrons, and neutrons differ from one another. o Know their relative sizes, locations, and charges. • Know and understand what an isotope is. o Know how to determine the number of protons, electrons, and neutrons given the  name or symbol of a specific isotope. • Know how to calculate the average atomic mass of an element. • Know the shells, subshells, and atomic orbitals and how many electrons can be held in each. • Know how to write complete electron configurations for atoms of the first 20 elements. • Know the difference between a group and a period in the periodic table. • Know the four important group names. • Know the number of valence electrons for the main group elements. Exam 1: Monday, September 11, 2017.CHEM 1117 Exam 1 Sp’15 Version A Name ________________________________ Part 1 – Multiple Choice Questions – Choose the one best answer for the thirty-five (35) questions that  follow. (2 points each)  _____ 1) How would you classify seaweed in salt water?  A) mixture-heterogeneous B) mixture-homogeneous  C) pure substance-element D) pure substance-compound  E) none of the above  _____ 2) A substance that can not be separated by chemical means into simpler substances is called a(n) A) solid B) element C) compound D) mixture _____ 3) All the following statements are correct EXCEPT A) The conversion of compounds into elements is a chemical change  B) The conversion of sugar to carbon dioxide and water is a physical change  C) The conversion of liquid water to solid ice is a physical change  D) The conversion of water into gaseous hydrogen and oxygen is a chemical change  E) The condensation of water is a physical change _____ 4) Which of the following is an example of a physical property? A) Corrosiveness of salt on metal B) Toxicity of cyanide C) Flammability of paper D) Neutralization of stomach acid with an antacid E) Lead becomes a liquid when heated to 601 oC _____ 5) A balance was calibrated using a standard mass of 1.0299 g and produced the following readings: 0.9999, 0.9998, 0.9998, 0.9999, and 0.9998. The balance performance is best described as  A) accurate but not precise. B) precise but not accurate  C) both accurate and precise. D) neither accurate nor precise.  _____ 6) The physical state that retains its volume but not its shape is A) solid B) liquid C) gas D) element _____ 7) Which state of matter has atomic spacing that is close together and definite in shape?  A) solid B) liquid C) gas D) plasma  _____ 8) The term used to describe the conversion from a solid state to a liquid state is ________. A) melting B) evaporation C) condensation D) sublimation _____ 9) The term used to describe the conversion from a gaseous state to a solid state is ________. A) freezing B) deposition C) condensation D) sublimation _____ 10) Which of the following CANNOT be the chemical symbol for a single element? A) Ca B) Cf C) B D) CSi _____ 11) What is the chemical symbol for iron? A) I B) Ir C) Fe D) In _____ 12) What is the name given to the element with the symbol Se? A) seaborgium B) selenium C) strontium D) sulfur _____ 13) Which of the following is an intensive property? A) volume B) mass C) density D) length _____ 14) The density of a 5.0 cm3 sample of a metal is 19.3 g/cm3. What is the density of 2.5 cm3 sample of  the same metal? A) 7.72 g/cm3 B) 9.65 g/cm3 C) 19.3 g/cm3 D) 38.6 g/cm3_____ 15) The prefix used to indicate 10-6 is ________. A) micro- B) milli- C) centi- D) kilo- _____ 16) The prefix used to indicate 103 is ________. A) micro- B) milli- C) centi- D) kilo- _____ 17) The correct answer for the operation (5.61 + 7.891) / 9.10 is ________. A) 1.483626374 B)1.484 C) 1.48 D) 1.5 _____ 18) For the measured value 16.7 L, what is the degree of uncertainty? A) +/- 1 L B) +/- 0.1 L C) +/- 0.10 L D) +/- 0.01 L _____ 19) To what decimal place should you record the measurement of a thermometer with a smallest scale  marking of 0.1oC? A) tens B) ones C) tenths D) hundredths  ______ 20) What are the readings of the length of the rectangle above using Ruler A and Ruler B? The units on  the rulers are centimeters. A) 4 cm for ruler A and 4.8 cm for ruler B B) 4.8 cm for ruler A and 4.83 cm for ruler B C) 4.82 cm for ruler A and 4.83 cm for ruler B D) 4.83 cm for ruler A and 4.835 cm for ruler B ______ 21) Which of the following statements about the nature of electrical charge is TRUE? A) Electrical charge is a fundamental property of protons, neutrons, and electrons. B) Positive and negative electrical charges repel each other. C) Positive-positive or negative-negative charges attract each other. D) Positive and neutral charges cancel each other so that when paired a proton and neutron are neutral. E) All of the above statements about electrical charge are FALSE. ______ 22) Which of the following elements has an atomic number of 6? A) H B) C C) He D) Be ______ 23) Which of the following elements has 12 and only 12 protons? A) carbon-12 B) nitrogen-12 C) magnesium-24 D) sodium-24 ______ 24) The following elements Na, Ar, and Cl are members of which group respectively: A) noble gases, halogens, and alkali metals B) alkaline earth metals, noble gases, and halogen C) alkali metals, noble gases, and halogens D) noble gases, alkaline earth metals, and halogens  E) none of the prior ______ 25) How many protons, neutrons, and electrons are present in an atom of calcium-42? A) 20 protons, 42 neutrons, and 20 electrons. B) 20 protons, 22 neutrons, and 20 electrons. C) 20 protons, 20 neutrons, and 20 electrons. D) 20 protons, 22 neutrons, and 18 electrons. E) none of the prior ______ 26) Which element is chemically similar to oxygen? A) sulfur B) magnesium C) iron D) potassium______ 27) Magnesium-24, magnesium-25, and magnesium-26 are three isotopes of magnesium; these isotopes  are: A) atoms of the same element that have a different number of protons. B) atoms of the same element that have a different number of electrons. C) atoms of the same element that have a different number of neutrons. D) atoms of the same element that have the same number of neutrons. E) none of the above ______ 28) A fictional element has two isotopes, each making up 50% of the population. Isotope 1 has a mass  of 80.0 amu, isotope 2 has a mass of 85.0 amu. Calculate the atomic mass of the fictional element. A) 82.5 amu B) 85 amu C) 80 amu D) 165 amu E) none of the prior ______ 29) Which is a pair of isotopes?  A) N2O and NO B) 24Na and 24Na+ C) 59Co and 59Ni D) 1H and 2H+ ______ 30) Which subatomic particle accounts for very little mass of an atom: A) electrons B) isotrons C) klingatrons D) protons ______ 31) In a single atom, what is the maximum number of electrons that can be in shell number 3? A) 2 B) 8 C) 18 D) 32 ______ 32) Which of the following subshells appear in the fourth shell? A) s B) s,p C) s, p, d D) s, p, d, f ______ 33) How many electrons can be "stored" in a completely filled 4f subshell? A) 2 B) 6 C) 10 D) 14 ______ 34) How many electrons can be "stored" in a completely filled 5d subshell? A) 2 B) 6 C) 10 D) 14 ______ 35) How many orbitals are there in a p-subshell? A) 1 B) 3 C) 5 D) 7 Part 2- Solve the following eight (8) problems. (To receive full credit for these problems you must show  your work; units and sig. fig. count.) (4 points each for the correct response and the proper work)  (1 point each for just a correct response) (partial credit will be given for correct work) ______ 36) What volume, in L, would a 3.55 kg sample of silver occupy? The density of silver is 10.5 g/mL. A) 3.38 L B) 0.126 L C) 3.73 L D) 0.338 L E) 12.6 L_____ 37) If the speed limit is 60.0 mi/hr, its equivalent in m/s is ________.  A) 9.86 B) 26.8 C) 37.3 D) 60.0 E) 96.5 _____ 38) The world record for the 100.00-meter dash is 9.6 s. If the world record holding runner could  maintain the same pace when running 7.5 kilometers, he would cover the distance in ________. A) 9.6 min B) 12 min C) 1.6 min D) 5.1 min E) 1.2 min _____ 39) A ruler that is 120.00 cm long is equivalent to ________ feet.  A) 3.9 ft B) 3.94 ft C) 3.937 ft D) 3.9370 ft_____ 40) The driving distance from Rochester MN to Houston TX is 1143 mi. If your car gets 32.0 mi to the  gallon and gas is $2.10 a gallon, how much will it cost to drive to Houston TX?  A) $75.0 B) $100 C) $67.2 D) $32.0 _____ 41) There are four isotopes of naturally occurring chromium with mass numbers of 50, 52, 53, and 54.  If the isotope mass and natural % of occurrence is as follows: 49.946 amu (4.350%), 51.941 amu (83.79%),  52.941 amu (9.50%), and 53.939 amu (2.36%). Determine the average atomic mass of naturally occurring  chromium (Cr).  A) 51.96 amu B) 51.996 amu C) 52.00 amu D) 52.011 amu _____ 42) The melting point of gold is 1948oF. What would the melting point of gold be on the Kelvin and  Celsius scales?  A) 2221 K and 1064 oC B) 1337 K and 1064 oC  C) 1948 K and 2221 oC D) 1064 K and 1337 oCCHEM 1117 Exam 1 Version A Name _______________KEY_________________ Part 1 – Multiple Choice Questions – Choose the one best answer for the thirty-five (35) questions that  follow. (2 points each)  __A___ 1) How would you classify seaweed in salt water?  A) mixture-heterogeneous B) mixture-homogeneous  C) pure substance-element D) pure substance-compound  E) none of the above  __B___ 2) A substance that can not be separated by chemical means into simpler substances is called a(n) A) solid B) element C) compound D) mixture __B___ 3) All the following statements are correct EXCEPT A) The conversion of compounds into elements is a chemical change  B) The conversion of sugar to carbon dioxide and water is a physical change  C) The conversion of liquid water to solid ice is a physical change  D) The conversion of water into gaseous hydrogen and oxygen is a chemical change  E) The condensation of water is a physical change __E___ 4) Which of the following is an example of a physical property? A) Corrosiveness of salt on metal B) Toxicity of cyanide C) Flammability of paper D) Neutralization of stomach acid with an antacid E) Lead becomes a liquid when heated to 601 oC __B___ 5) A balance was calibrated using a standard mass of 1.0299 g and produced the following readings: 0.9999, 0.9998, 0.9998, 0.9999, and 0.9998. The balance performance is best described as  A) accurate but not precise. B) precise but not accurate  C) both accurate and precise. D) neither accurate nor precise.  __B___ 6) The physical state that retains its volume but not its shape is A) solid B) liquid C) gas D) element __A___ 7) Which state of matter has atomic spacing that is close together and definite in shape?  A) solid B) liquid C) gas D) plasma  __A___ 8) The term used to describe the conversion from a solid state to a liquid state is ________. A) melting B) evaporation C) condensation D) sublimation __B___ 9) The term used to describe the conversion from a gaseous state to a solid state is ________. A) freezing B) deposition C) condensation D) sublimation __D___ 10) Which of the following CANNOT be the chemical symbol for a single element? A) Ca B) Cf C) B D) CSi __C___ 11) What is the chemical symbol for iron? A) I B) Ir C) Fe D) In __B___ 12) What is the name given to the element with the symbol Se? A) seaborgium B) selenium C) strontium D) sulfur __C___ 13) Which of the following is an intensive property? A) volume B) mass C) density D) length __C___ 14) The density of a 5.0 cm3 sample of a metal is 19.3 g/cm3. What is the density of 2.5 cm3 sample  of the same metal? A) 7.72 g/cm3 B) 9.65 g/cm3 C) 19.3 g/cm3 D) 38.6 g/cm3__A___ 15) The prefix used to indicate 10-6 is ________. A) micro- B) milli- C) centi- D) kilo- __D___ 16) The prefix used to indicate 103 is ________. A) micro- B) milli- C) centi- D) kilo- __C___ 17) The correct answer for the operation (5.61 + 7.891) / 9.10 is ________. A) 1.483626374 B)1.484 C) 1.48 D) 1.5 __B___ 18) For the measured value 16.7 L, what is the degree of uncertainty? A) +/- 1 L B) +/- 0.1 L C) +/- 0.10 L D) +/- 0.01 L __D___ 19) To what decimal place should you record the measurement of a thermometer with a smallest  scale marking of 0.1oC?  A) tens B) ones C) tenths D) hundredths  __B____ 20) What are the readings of the length of the rectangle above using Ruler A and Ruler B? The units  on the rulers are centimeters. A) 4 cm for ruler A and 4.8 cm for ruler B B) 4.8 cm for ruler A and 4.83 cm for ruler B C) 4.82 cm for ruler A and 4.83 cm for ruler B D) 4.83 cm for ruler A and 4.835 cm for ruler B __E____ 21) Which of the following statements about the nature of electrical charge is TRUE? A) Electrical charge is a fundamental property of protons, neutrons, and electrons. B) Positive and negative electrical charges repel each other. C) Positive-positive or negative-negative charges attract each other. D) Positive and neutral charges cancel each other so that when paired a proton and neutron are neutral. E) All of the above statements about electrical charge are FALSE. __B____ 22) Which of the following elements has an atomic number of 6? A) H B) C C) He D) Be __C____ 23) Which of the following elements has 12 protons? A) carbon-12 B) nitrogen-12 C) magnesium-24 D) sodium-24 __C____ 24) The following elements Na, Ar, and Cl are members of which group respectively: A) noble gases, halogens, and alkali metals B) alkaline earth metals, noble gases, and halogen C) alkali metals, noble gases, and halogens D) noble gases, alkaline earth metals, and halogens  E) none of the prior __B____ 25) How many protons, neutrons, and electrons are present in an atom of calcium-42? A) 20 protons, 42 neutrons, and 20 electrons. B) 20 protons, 22 neutrons, and 20 electrons. C) 20 protons, 20 neutrons, and 20 electrons. D) 20 protons, 22 neutrons, and 18 electrons. E) none of the prior __A____ 26) Which element is chemically similar to oxygen? A) sulfur B) magnesium C) iron D) potassium__C____ 27) Magnesium-24, magnesium-25, and magnesium-26 are three isotopes of magnesium; these  isotopes are: A) atoms of the same element that have a different number of protons. B) atoms of the same element that have a different number of electrons. C) atoms of the same element that have a different number of neutrons. D) atoms of the same element that have the same number of neutrons. E) none of the above __A____ 28) A fictional element has two isotopes, each making up 50 % of the population. Isotope 1 has a  mass of 80.0 amu, isotope 2 has a mass of 85.0 amu. Calculate the atomic mass of the fictional element. A) 82.5 amu B) 85 amu C) 80 amu D) 165 amu E) none of the prior __D____ 29) Which is a pair of isotopes?  A) N2O and NO B) 24Na and 24Na+ C) 59Co and 59Ni D) 1H and 2H+ __A____ 30) Which subatomic particle accounts for very little mass of an atom: A) electrons B) isotrons C) klingatrons D) protons __C____ 31) In a single atom, what is the maximum number of electrons that can be in shell number 3? A) 2 B) 8 C) 18 D) 32 __D____ 32) Which of the following subshells appear in the fourth shell? A) s B) s,p C) s, p, d D) s, p, d, f __D____ 33) How many electrons can be "stored" in a completely filled 4f subshell? A) 2 B) 6 C) 10 D) 14 __C____ 34) How many electrons can be "stored" in a completely filled 5d subshell? A) 2 B) 6 C) 10 D) 14 __B____ 35) How many orbitals are there in a p-subshell? A) 1 B) 3 C) 5 D) 7 Part 2- Solve the following eight (8) problems. (To receive full credit for these problems you must show  your work; units and sig. fig. count.) (4 points each for the correct response and the proper work)  (1 point each for just a correct response) (partial credit will be given for correct work) __D____ 36) What volume, in L, would a 3.55 kg sample of silver occupy? The density of silver is 10.5 g/mL. 3.55 kg x 103 g x 1 mL x 10-3 L = 0.338 L   1 kg 10.5 g 1 mL A) 3.38 L B) 0.126 L C) 3.73 L D) 0.338 L E) 12.6 L__B___ 37) If the speed limit is 60.0 mi/hr, its equivalent in m/s is ________.  60.0 mi x 1.609 km x 103 m x 1 hr = 26.8 m  1 hr 1 mi 1 km 3600 s 1 s A) 9.86 B) 26.8 C) 37.3 D) 60.0 E) 96.5 __B___ 38) The world record for the 100.00-meter dash is 9.6 s. If the world record holding runner could  maintain the same pace when running 7.5 kilometers, he would cover the distance in ________. 7.5 km x 103 m x 9.6 s x 1 min = 12 min  1 km 100.00 m 60 s  A) 9.6 min B) 12 min C) 1.6 min D) 5.1 min E) 1.2 min __D___ 39) A ruler that is 120.00 cm long is equivalent to ________ feet.  120.00 cm x 1 in x 1 ft = 3.9370 ft  2.54 cm 12 in A) 3.9 ft B) 3.94 ft C) 3.937 ft D) 3.9370 ft__A___ 40) The driving distance from Rochester MN to Houston TX is 1143 mi. If your car gets 32.0 mi to the  gallon and gas is $2.10 a gallon, how much will it cost to drive to Houston TX?  1143 mi x 1 gal x $2.10 = $75.0  32.0 mi 1 gal A) $75.0 B) $100 C) $67.2 D) $32.0 __C___ 41) There are four isotopes of naturally occurring chromium with mass numbers of 50, 52, 53, and 54.  If the isotope mass and natural % of occurrence is as follows: 49.946 amu (4.350 %), 51.941 amu (83.79 %),  52.941 amu (9.50 %), and 53.939 amu (2.36 %). Determine the average atomic mass of naturally occurring  chromium (Cr).  49.946 amu x 4.350% = 2.1727 amu  100% 51.941 amu x 83.79% = 43.5214 amu  100%  52.941 amu x 9.50% = 5.0294 amu  100%  53.939 amu x 2.36% = 1.2730 amu  100% 51.9965 amu = 52.00 amu A) 51.96 amu B) 51.996 amu C) 52.00 amu D) 52.011 amu __B___ 42) The melting point of gold is 1948 oF. What would the melting point of gold be on the Kelvin and  Celsius scales?  (1948 oF – 32 oF) x (5 oC/9 oF) = 1064 oC 1064 oC (1 K/1 oC) + 273 K = 1337 K A) 2221 K and 1064 oC B) 1337 K and 1064 oC  C) 1948 K and 2221 oC D) 1064 K and 1337 oC

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