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Final Exam Practice Problems Set 2
... When 0.387 g of Cr is heated in an atmosphere of Cl2 gas, a combination reaction occurs and 1.178 g of a solid compound is formed. Assuming that all of the chromium reacts, what is the mass of chlorine that ...
... When 0.387 g of Cr is heated in an atmosphere of Cl2 gas, a combination reaction occurs and 1.178 g of a solid compound is formed. Assuming that all of the chromium reacts, what is the mass of chlorine that ...
Balancing Chemical Equations
... due to the Law of Conservation of Mass, mass of reactants = mass of products o we cannot change the formulas therefore we must change the number of molecules o we do this by adding coefficients in front of the formulas coefficient = number written in front to the chemical symbol or formula balance ...
... due to the Law of Conservation of Mass, mass of reactants = mass of products o we cannot change the formulas therefore we must change the number of molecules o we do this by adding coefficients in front of the formulas coefficient = number written in front to the chemical symbol or formula balance ...
Chemistry ~ Fall Final Review
... 14. What is a mole? Why do chemists use the mole? 15. How many atoms are in 5.0 mol of Al? (Use dimensional analysis/units/sig figs) 16. How many mol are in 9.0 g of water? 17. What is the mass of 1.3 x 1023 molecules of calcium sulfate? 18. Determine the % composition by mass of each element in gly ...
... 14. What is a mole? Why do chemists use the mole? 15. How many atoms are in 5.0 mol of Al? (Use dimensional analysis/units/sig figs) 16. How many mol are in 9.0 g of water? 17. What is the mass of 1.3 x 1023 molecules of calcium sulfate? 18. Determine the % composition by mass of each element in gly ...
Chemistry I Honors – Semester Exam Review – Fall 2000
... 21. Find the energy of a photon if frequency is 7.31 x 1014 Hz. 22. Describe how Bohr’s model explains the bright lines (red, green, violet, violet) in the emission spectrum of hydrogen. 23. What is the primary difference between the modern model of the atom and Bohr’s model? 24. Draw orbital diagra ...
... 21. Find the energy of a photon if frequency is 7.31 x 1014 Hz. 22. Describe how Bohr’s model explains the bright lines (red, green, violet, violet) in the emission spectrum of hydrogen. 23. What is the primary difference between the modern model of the atom and Bohr’s model? 24. Draw orbital diagra ...
Unit 2 PowerPoint part 2
... * Which isotope of copper is more abundant: copper-63 or copper-65? ...
... * Which isotope of copper is more abundant: copper-63 or copper-65? ...
Practice questions
... Which one of the following lists gives the correct symbols for the elements phosphorus, potassium, silver, chlorine, and sulfur? a) K, Ag, Po, Cl, S b) P, Po, Ag, Cl, S c) Ph, K, Ag, S, Cl d) P, K, Ag, Cl, S e) Ph, Po, Ag, Cl, S ...
... Which one of the following lists gives the correct symbols for the elements phosphorus, potassium, silver, chlorine, and sulfur? a) K, Ag, Po, Cl, S b) P, Po, Ag, Cl, S c) Ph, K, Ag, S, Cl d) P, K, Ag, Cl, S e) Ph, Po, Ag, Cl, S ...
Name
... A physical property is observed with the senses and can be determined without changing the substance. For example, color, shape, mass, length, density, specific heat, and odor are all examples of physical change. A chemical property indicates how a substance reacts with another substance. The origi ...
... A physical property is observed with the senses and can be determined without changing the substance. For example, color, shape, mass, length, density, specific heat, and odor are all examples of physical change. A chemical property indicates how a substance reacts with another substance. The origi ...
Review Sheet for Chemistry* First Semester Final
... Metals lose electrons and form _____________ while nonmetals gain and electrons form __________. Molecular compounds form when a ______________ and a _______________ combine as they share electrons. Identify the following pairs of atoms as potentially forming an ionic or molecular compound: Mg and C ...
... Metals lose electrons and form _____________ while nonmetals gain and electrons form __________. Molecular compounds form when a ______________ and a _______________ combine as they share electrons. Identify the following pairs of atoms as potentially forming an ionic or molecular compound: Mg and C ...
Molecules and Ions
... Trick – many molecular ions appear on the data sheet (see handout). Just keep using (homework) and/or looking (fridge) at the rest ...
... Trick – many molecular ions appear on the data sheet (see handout). Just keep using (homework) and/or looking (fridge) at the rest ...
Molecules and Ions
... Trick – many molecular ions appear on the data sheet (see handout). Just keep using (homework) and/or looking (fridge) at the rest ...
... Trick – many molecular ions appear on the data sheet (see handout). Just keep using (homework) and/or looking (fridge) at the rest ...
TEST on Atomic Structure
... Similar to all of my tests and quizzes, the questions on your FINAL EXAM will be similar to these provided on this practice test. I recommend that you look over your old tests, old practice tests, old quizzes, old notes, old homework assignments… to help you prepare for the final exam. I am almost a ...
... Similar to all of my tests and quizzes, the questions on your FINAL EXAM will be similar to these provided on this practice test. I recommend that you look over your old tests, old practice tests, old quizzes, old notes, old homework assignments… to help you prepare for the final exam. I am almost a ...
Document
... Elements are composed of extremely small particles called atoms. All atoms of same element are alike. The separation of atoms and union of atoms occur in chemical reactions. In these reactions, no atom is created of destroyed, and no one atom of one element is converted into an atom of ...
... Elements are composed of extremely small particles called atoms. All atoms of same element are alike. The separation of atoms and union of atoms occur in chemical reactions. In these reactions, no atom is created of destroyed, and no one atom of one element is converted into an atom of ...
AP Chemistry Review Assignment Brown and LeMay: Chemistry the
... 29. Without doing any detailed calculations (but using a periodic table to give atomic weights), rank the following samples in order of increasing number of atoms: 0.50 mol H2O; 23 g Na; 6.0 x 1023 N2 molecules. 33. Calculate the following quantities: a) mass, in grams, of 0.105 moles sucrose (C12H2 ...
... 29. Without doing any detailed calculations (but using a periodic table to give atomic weights), rank the following samples in order of increasing number of atoms: 0.50 mol H2O; 23 g Na; 6.0 x 1023 N2 molecules. 33. Calculate the following quantities: a) mass, in grams, of 0.105 moles sucrose (C12H2 ...
Chapter 2 Practice Questions
... 2. Which of the following pairs of compounds can be used to illustrate the law of multiple proportions? A) NH4 and NH4Cl B) ZnO2 and ZnCl2 C) H2O and HCl D) NO and NO2 E) CH4 and CO2 3. Which of the following statements from Dalton's atomic theory is no longer true, according to modern atomic theory ...
... 2. Which of the following pairs of compounds can be used to illustrate the law of multiple proportions? A) NH4 and NH4Cl B) ZnO2 and ZnCl2 C) H2O and HCl D) NO and NO2 E) CH4 and CO2 3. Which of the following statements from Dalton's atomic theory is no longer true, according to modern atomic theory ...
CHAPTER 1, MATTER AND CHANGE Section 1, Chemistry Is a
... Six branches of chemistry: organic chemistry, inorganic chemistry, physical chemistry, analytical chemistry, biochemistry, and theoretical chemistry. A chemical is any substance that has a definite composition. Section 2, Matter and Its Properties Mass is a measure of the amount of matter. (Use a ba ...
... Six branches of chemistry: organic chemistry, inorganic chemistry, physical chemistry, analytical chemistry, biochemistry, and theoretical chemistry. A chemical is any substance that has a definite composition. Section 2, Matter and Its Properties Mass is a measure of the amount of matter. (Use a ba ...
Chemistry Semester Test Study Guide Chapters
... What state of matter has a definite volume and takes the shape of its container? Which state of matter takes both the shape and volume of its container? In a chemical reaction, what are the reactants and what are the products? If the total mass of the reactants in a chemical reaction is 60 g, what i ...
... What state of matter has a definite volume and takes the shape of its container? Which state of matter takes both the shape and volume of its container? In a chemical reaction, what are the reactants and what are the products? If the total mass of the reactants in a chemical reaction is 60 g, what i ...
Chemistry: The Nature of Matter
... More distant an electron is from the nucleus, the greater the energy possible in the atom Different states of energy are called energy levels or electron shells o 1st shell is closest to the nucleus, has the lowest energy, and holds only 2 electrons o 2nd shell has a little more energy and holds ...
... More distant an electron is from the nucleus, the greater the energy possible in the atom Different states of energy are called energy levels or electron shells o 1st shell is closest to the nucleus, has the lowest energy, and holds only 2 electrons o 2nd shell has a little more energy and holds ...
Chapter 4
... Isotopes and Mass Number Isotopes ■ Elements that have the same number of protons but different numbers of neutrons ■ These atoms keep the same chemical properties because they have the same number of electrons ■ We use the number of neutrons or mass number to tell isotopes apart ■ Mass number or A ...
... Isotopes and Mass Number Isotopes ■ Elements that have the same number of protons but different numbers of neutrons ■ These atoms keep the same chemical properties because they have the same number of electrons ■ We use the number of neutrons or mass number to tell isotopes apart ■ Mass number or A ...
Midterm Review 2017
... chemically combined in a fixed proportion? 1) solution 2) compound 3) homogeneous mixture 4) heterogeneous mixture 48) Which substance can be broken down by a chemical change? 1) antimony ...
... chemically combined in a fixed proportion? 1) solution 2) compound 3) homogeneous mixture 4) heterogeneous mixture 48) Which substance can be broken down by a chemical change? 1) antimony ...
Empirical Formula
... • Count the number of atoms of each element in the reactants and in the products, and record the results in a table. • Identify elements that appear in only one reactant and in only one product, and balance the atoms of those elements first. Delay the balancing of atoms (often hydrogen and oxygen) t ...
... • Count the number of atoms of each element in the reactants and in the products, and record the results in a table. • Identify elements that appear in only one reactant and in only one product, and balance the atoms of those elements first. Delay the balancing of atoms (often hydrogen and oxygen) t ...
Chemistry and the Environment - Teach-n-Learn-Chem
... 1. What does it mean to say that the Earth is a “closed system”? Nothing can leave the ecosystem once it is created. There is no “away”. We can't just throw something “away” when we no longer want it. 2. List three examples of how nature recycles. Production and recycling of oxygen, nitrogen, and ca ...
... 1. What does it mean to say that the Earth is a “closed system”? Nothing can leave the ecosystem once it is created. There is no “away”. We can't just throw something “away” when we no longer want it. 2. List three examples of how nature recycles. Production and recycling of oxygen, nitrogen, and ca ...