Chemical Equations
... Balancing Chemical Equations • To represent chemical equations correctly, equations must be balanced. • The number of atoms on both sides of the equation must be the same • Law of conservation of mass – the total mass of the reactants in a chemical reaction is equal to the total mass of the product ...
... Balancing Chemical Equations • To represent chemical equations correctly, equations must be balanced. • The number of atoms on both sides of the equation must be the same • Law of conservation of mass – the total mass of the reactants in a chemical reaction is equal to the total mass of the product ...
Chapte 11 Study Questions
... ____ 52. Which of the following statements describes isotopes? a. Isotopes are atoms of the same element. b. Isotopes have the same number of protons but have different numbers of neutrons. c. Isotopes have the same atomic number but have different mass numbers. d. all of the above ____ 53. Isotopes ...
... ____ 52. Which of the following statements describes isotopes? a. Isotopes are atoms of the same element. b. Isotopes have the same number of protons but have different numbers of neutrons. c. Isotopes have the same atomic number but have different mass numbers. d. all of the above ____ 53. Isotopes ...
Chapter 6 Chemical reactions Classification And Mass Relationships
... • The same is true for atoms or molecules of different substances. Equal numbers hydrogen and glucose molecules always have a mass ratio equal to the ratio of their molecular weights, 2:180. Chapter 6 ...
... • The same is true for atoms or molecules of different substances. Equal numbers hydrogen and glucose molecules always have a mass ratio equal to the ratio of their molecular weights, 2:180. Chapter 6 ...
Chapter 7 – Chemical Formulas and Chemical
... equal to the charge of that ion. 8. Rules 1-7 apply to covalent compounds, but oxidation numbers can be assigned to ionic compounds. Examples: for monatomic ions the oxidation number is equal to the ionic charge. Ca+2 = +2 or I- = -1 Compound HF: F is the most electronegative element in the polar co ...
... equal to the charge of that ion. 8. Rules 1-7 apply to covalent compounds, but oxidation numbers can be assigned to ionic compounds. Examples: for monatomic ions the oxidation number is equal to the ionic charge. Ca+2 = +2 or I- = -1 Compound HF: F is the most electronegative element in the polar co ...
Chapter 2 Notes
... exhibit similar chemical and physical properties. We therefore expect that Ca and Mg should be most alike because they are in the same group (2A, the alkaline earth metals). ...
... exhibit similar chemical and physical properties. We therefore expect that Ca and Mg should be most alike because they are in the same group (2A, the alkaline earth metals). ...
Electrons in Atoms
... • The arrangement of electrons in an atom is called the atom’s electron configuration. • Electron configurations are defined by the aufbau principle, the Pauli exclusion principle, and Hund’s rule. • An element’s valence electrons determine the chemical properties of the element. • Electron configur ...
... • The arrangement of electrons in an atom is called the atom’s electron configuration. • Electron configurations are defined by the aufbau principle, the Pauli exclusion principle, and Hund’s rule. • An element’s valence electrons determine the chemical properties of the element. • Electron configur ...
Sample Paper Chemistry - Educomp Solutions Ltd.
... stability of phenoxide ion. The carboxylate ion is much more resonance stabilized than phenoxide ion. (ii) Semicarbazide has two –NH2 groups. One of them, which is directly attached to C=O is involved in resonance. Thus electron density on this group decreases and it does not act as a nucleophile. I ...
... stability of phenoxide ion. The carboxylate ion is much more resonance stabilized than phenoxide ion. (ii) Semicarbazide has two –NH2 groups. One of them, which is directly attached to C=O is involved in resonance. Thus electron density on this group decreases and it does not act as a nucleophile. I ...
Chemical Equations and Reactions
... • If an atom appears more than once on a side, balance it last. • If you fix everything except one element, and it is even on one side and odd on the other, double the first number, then move on from there. C4H10 + O2 CO2 + H2O ...
... • If an atom appears more than once on a side, balance it last. • If you fix everything except one element, and it is even on one side and odd on the other, double the first number, then move on from there. C4H10 + O2 CO2 + H2O ...
The production and use of metals
... called TIMET in Waunarlwydd. During the cold war they used to make the titanium into parts to send nuclear bombs over to Russia. Now they use it for Rolls Royce engine parts. Relate the uses of these metals to their properties; for example you might say that aluminium is used in food wrapping becaus ...
... called TIMET in Waunarlwydd. During the cold war they used to make the titanium into parts to send nuclear bombs over to Russia. Now they use it for Rolls Royce engine parts. Relate the uses of these metals to their properties; for example you might say that aluminium is used in food wrapping becaus ...
Electrochemistry - Menihek Home Page
... 6OH- + 3CN- 3CNO- + 3H2O + 6e6e-+ 4 H2O + 2MnO4- 2MnO2 + 8OH___________________________________________ H2O + 2MnO4- + 3CN- 3CNO- + 2MnO2 + 2OH- ...
... 6OH- + 3CN- 3CNO- + 3H2O + 6e6e-+ 4 H2O + 2MnO4- 2MnO2 + 8OH___________________________________________ H2O + 2MnO4- + 3CN- 3CNO- + 2MnO2 + 2OH- ...
Nuts,Bolts and Isotopes- Average Atomic Mass Activity
... (for example carbon is composed of carbon atoms). However, not all of the atoms found in that element are the same. For example, carbon contains three different types of atoms (carbon-12, 13 and 14). Each atom has the same number of protons and electrons but differing numbers of neutrons. These are ...
... (for example carbon is composed of carbon atoms). However, not all of the atoms found in that element are the same. For example, carbon contains three different types of atoms (carbon-12, 13 and 14). Each atom has the same number of protons and electrons but differing numbers of neutrons. These are ...
5073 Chemistry (SPA)
... Dalton, revived the term when he suggested that each element was made up of unique atoms and the atoms of an element are all the same. At that time, there were about 35 known elements. This simple model could explain the millions of different materials around us. Differences between atoms give eleme ...
... Dalton, revived the term when he suggested that each element was made up of unique atoms and the atoms of an element are all the same. At that time, there were about 35 known elements. This simple model could explain the millions of different materials around us. Differences between atoms give eleme ...
AP Chemistry Unit 1 Essential Questions Screencast 1
... Screencast 1-1 Introduction to the Periodic Table 1. What is an element? 2. How are the symbols for the elements determined? 3. How is the order of the elements determined on the modern periodic table? 4. What are the main regions of the periodic table? 5. What are the special named groups and where ...
... Screencast 1-1 Introduction to the Periodic Table 1. What is an element? 2. How are the symbols for the elements determined? 3. How is the order of the elements determined on the modern periodic table? 4. What are the main regions of the periodic table? 5. What are the special named groups and where ...
Chapter 8 Thermochemistry: Chemical Energy
... When 25.0 mL of 1.0 M H2SO4 is added to 50.0 mL of 1.0 M NaOH at 25.0°C in a calorimeter, the temperature of the solution increases to 33.9°C. Assume specific heat of solution is 4.184 J/(g–1·°C–1), and the density is 1.00 g/mL–1, calculate ΔH for the ...
... When 25.0 mL of 1.0 M H2SO4 is added to 50.0 mL of 1.0 M NaOH at 25.0°C in a calorimeter, the temperature of the solution increases to 33.9°C. Assume specific heat of solution is 4.184 J/(g–1·°C–1), and the density is 1.00 g/mL–1, calculate ΔH for the ...
Types of Aqueous Reactions
... Depends! They are ionic, so they could be solids. But, they could also be aqueous. How? If they are water soluble solids then they are aqueous! (The reactants are in ...
... Depends! They are ionic, so they could be solids. But, they could also be aqueous. How? If they are water soluble solids then they are aqueous! (The reactants are in ...
Ch6.Thermochem - Mr. Fischer.com
... M NaCl (aq), both initially at 22.4 °C, are mixed in a coffee cup calorimeter. The temperature rises to 30.2 °C. What is the heat of reaction, in kJ per mol AgCl, for the reaction: Ag1+ (aq) + Cl1– (aq) AgCl (s) ...
... M NaCl (aq), both initially at 22.4 °C, are mixed in a coffee cup calorimeter. The temperature rises to 30.2 °C. What is the heat of reaction, in kJ per mol AgCl, for the reaction: Ag1+ (aq) + Cl1– (aq) AgCl (s) ...
Student Activity PDF - TI Education
... An integer immediately following a letter or closing parenthesis is converted to subscript. This is the number of atoms or group of atoms in a molecule. ...
... An integer immediately following a letter or closing parenthesis is converted to subscript. This is the number of atoms or group of atoms in a molecule. ...
Reversible and irreversible reactions - Chemwiki
... To understand the concept of static equilibrium, let us consider two children sitting on a see-saw. At balance point (i.e., the equilibrium position) no movement of children on the see-saw occurs. In the case of reversible reactions, however a static equilibrium is not being established. In the case ...
... To understand the concept of static equilibrium, let us consider two children sitting on a see-saw. At balance point (i.e., the equilibrium position) no movement of children on the see-saw occurs. In the case of reversible reactions, however a static equilibrium is not being established. In the case ...
Review History of the Atom
... Dalton devised the first modern atomic model. Which one of the following characteristics is NOT part of Dalton's atomic model? a. Atoms of different elements are different. b. All atoms of the same element are identical. c. Atoms combine to form compounds. d. Atoms consist of positive particles and ...
... Dalton devised the first modern atomic model. Which one of the following characteristics is NOT part of Dalton's atomic model? a. Atoms of different elements are different. b. All atoms of the same element are identical. c. Atoms combine to form compounds. d. Atoms consist of positive particles and ...
Atoms and Molecules
... • Electrons preferentially occupy separate orbitals within the valence shell until forced to share orbitals. • The four valence electrons of carbon each occupy separate orbitals, but the five valence electrons of nitrogen are distributed into three unshared orbitals and one shared orbital. • When at ...
... • Electrons preferentially occupy separate orbitals within the valence shell until forced to share orbitals. • The four valence electrons of carbon each occupy separate orbitals, but the five valence electrons of nitrogen are distributed into three unshared orbitals and one shared orbital. • When at ...
Electrons
... the Periodic Table Section 1: Structure of the Atom Section 2: Masses of Atoms Section 3: The Periodic Table ...
... the Periodic Table Section 1: Structure of the Atom Section 2: Masses of Atoms Section 3: The Periodic Table ...
Chapter 8 Chemical Equations and Reactions
... iv) List four kinds of single-displacement reactions and three kinds of double-displacement reactions. v) Predict the products of simple reactions given the reactants. ...
... iv) List four kinds of single-displacement reactions and three kinds of double-displacement reactions. v) Predict the products of simple reactions given the reactants. ...