1 - Mr. J`s Chemistry 4U
... 52) T / F : Every sample of a given pure substance can have different physical and chemical properties. 53) T / F : Every sample of a given pure substance has exactly the same chemical composition. 54) T / F : A pure substance cannot be separated into other substances without changing its identity. ...
... 52) T / F : Every sample of a given pure substance can have different physical and chemical properties. 53) T / F : Every sample of a given pure substance has exactly the same chemical composition. 54) T / F : A pure substance cannot be separated into other substances without changing its identity. ...
TIPS for NET-IONIC EQUATIONS A.P. Chemistry (long form)
... or the cations of weak bases with water. These are typical of the processes which occur when salts of these compounds enter water. You will better understand this type of reaction when we get to acid/base chemistry and the behavior of weak acids/bases. The net ionic reaction for something as innocen ...
... or the cations of weak bases with water. These are typical of the processes which occur when salts of these compounds enter water. You will better understand this type of reaction when we get to acid/base chemistry and the behavior of weak acids/bases. The net ionic reaction for something as innocen ...
Answers - U of L Class Index
... Add each salt to a beaker containing an acidic solution such as HCl(aq). The lithium carbonate will react with the acid to produce bubbles of carbon dioxide. As the carbonate reacts, the salt will appear to dissolve. The lithium nitrate will neither react with the acid nor dissolve in the water. ...
... Add each salt to a beaker containing an acidic solution such as HCl(aq). The lithium carbonate will react with the acid to produce bubbles of carbon dioxide. As the carbonate reacts, the salt will appear to dissolve. The lithium nitrate will neither react with the acid nor dissolve in the water. ...
AP Exam Review Questions
... • This type of formula represents the simplest whole-number ratio of elements in a compound? • Ans: empirical formula ...
... • This type of formula represents the simplest whole-number ratio of elements in a compound? • Ans: empirical formula ...
H 2 (g)
... substance by one degree Celsius (Jg 1C1). Heat capacity, C Heat capacity,C is the amount of heat required to raise the temperature of a given quantity of the substance by one degree Celsius (JC1) ...
... substance by one degree Celsius (Jg 1C1). Heat capacity, C Heat capacity,C is the amount of heat required to raise the temperature of a given quantity of the substance by one degree Celsius (JC1) ...
Syllabus_summer 2014_1411_ZF_learning web
... inorganic salts to enormously complex molecules such as enzymes and nucleic acids in living organisms. In this course, the major topics we will be covering are chemical formulas, reactions, and stoichiometry calculations, chemical thermodynamics, electron configuration and chemical bonding, gas laws ...
... inorganic salts to enormously complex molecules such as enzymes and nucleic acids in living organisms. In this course, the major topics we will be covering are chemical formulas, reactions, and stoichiometry calculations, chemical thermodynamics, electron configuration and chemical bonding, gas laws ...
105
... in section 10.3, you sometimes used oxidation numbers to determine the reactant(s) and product(s) in each half-reaction. In fact, you can use oxidation numbers to balance a chemical equation by a new method. The oxidation number method is a method of balancing redox equations by ensuring that the to ...
... in section 10.3, you sometimes used oxidation numbers to determine the reactant(s) and product(s) in each half-reaction. In fact, you can use oxidation numbers to balance a chemical equation by a new method. The oxidation number method is a method of balancing redox equations by ensuring that the to ...
Word - chemmybear.com
... 11. Ammonium chloride is placed inside a closed vessel where it comes into equilibrium at 400C according to the equation shown. Only these three substances are present inside the vessel. If Kp for the system at 400C is 0.640, what is the pressure inside the vessel? NH4Cl(s) NH3(g) + HCl(g) 12. Bro ...
... 11. Ammonium chloride is placed inside a closed vessel where it comes into equilibrium at 400C according to the equation shown. Only these three substances are present inside the vessel. If Kp for the system at 400C is 0.640, what is the pressure inside the vessel? NH4Cl(s) NH3(g) + HCl(g) 12. Bro ...
The Complete Notes - Joliet Junior College
... Fact: Chemistry relies on a cumulative method of learning, i.e. theories learnt from week 1 onwards will be repeatedly applied all the way through the course. Thus, it is important that the student does not let any ‘gaps’ in their knowledge develop. This fact exemplifies the differences in philosoph ...
... Fact: Chemistry relies on a cumulative method of learning, i.e. theories learnt from week 1 onwards will be repeatedly applied all the way through the course. Thus, it is important that the student does not let any ‘gaps’ in their knowledge develop. This fact exemplifies the differences in philosoph ...
South Pasadena · AP Chemistry
... 11. Ammonium chloride is placed inside a closed vessel where it comes into equilibrium at 400C according to the equation shown. Only these three substances are present inside the vessel. If Kp for the system at 400C is 0.640, what is the pressure inside the vessel? NH4Cl(s) NH3(g) + HCl(g) 12. Bro ...
... 11. Ammonium chloride is placed inside a closed vessel where it comes into equilibrium at 400C according to the equation shown. Only these three substances are present inside the vessel. If Kp for the system at 400C is 0.640, what is the pressure inside the vessel? NH4Cl(s) NH3(g) + HCl(g) 12. Bro ...
Chemical Quantities and Aqueous Reactions
... of fossil fuel that is burned—the balanced chemical equations for the combustion reactions give the exact relationships between these amounts. In this discussion, we use octane (a component of gasoline) as a representative fossil fuel. The balanced equation for the combustion of octane is as follows ...
... of fossil fuel that is burned—the balanced chemical equations for the combustion reactions give the exact relationships between these amounts. In this discussion, we use octane (a component of gasoline) as a representative fossil fuel. The balanced equation for the combustion of octane is as follows ...
Astrochemistry and Star Formation
... probes of physical conditions. Molecules have unique values as probes because (i) their spectra are so rich and diverse that they can be used to understand the details of their surroundings and even heterogeneities in these details, and (ii) chemical processes that both form and destroy molecules yi ...
... probes of physical conditions. Molecules have unique values as probes because (i) their spectra are so rich and diverse that they can be used to understand the details of their surroundings and even heterogeneities in these details, and (ii) chemical processes that both form and destroy molecules yi ...
Appendices and Glossary
... carbon atoms and two moles of oxygen atoms. The atom ratio and the mole ratio of the elements are identical! The chemical formula of an ionic compound does not tell us the number of atoms in a molecule because ionic substances are not molecular. However, it still gives the mole ratio of the elements ...
... carbon atoms and two moles of oxygen atoms. The atom ratio and the mole ratio of the elements are identical! The chemical formula of an ionic compound does not tell us the number of atoms in a molecule because ionic substances are not molecular. However, it still gives the mole ratio of the elements ...
C3 Revision Question Booklet
... “A substance that cannot be broken down into simpler substances by chemical methods.” The table shows some of the “substances” which Antoine Lavoisier thought were elements. He divided the “substances” into four groups. He published these groups in 1789. The modem names of some of the “substances” a ...
... “A substance that cannot be broken down into simpler substances by chemical methods.” The table shows some of the “substances” which Antoine Lavoisier thought were elements. He divided the “substances” into four groups. He published these groups in 1789. The modem names of some of the “substances” a ...
Learning objectives - The John Warner School
... Increasing the surface area of solid reactants increases the frequency of collisions and so increases the rate of reaction. [C2.4.1 f)] Interpret graphs showing the amount of product formed (or reactant used up) with time, in terms of the rate of the reaction. Controlled Assessment: AS4.2 Assess and ...
... Increasing the surface area of solid reactants increases the frequency of collisions and so increases the rate of reaction. [C2.4.1 f)] Interpret graphs showing the amount of product formed (or reactant used up) with time, in terms of the rate of the reaction. Controlled Assessment: AS4.2 Assess and ...
Stoichiometry
Stoichiometry /ˌstɔɪkiˈɒmɨtri/ is the calculation of relative quantities of reactants and products in chemical reactions.Stoichiometry is founded on the law of conservation of mass where the total mass of the reactants equals the total mass of the products leading to the insight that the relations among quantities of reactants and products typically form a ratio of positive integers. This means that if the amounts of the separate reactants are known, then the amount of the product can be calculated. Conversely, if one reactant has a known quantity and the quantity of product can be empirically determined, then the amount of the other reactants can also be calculated.As seen in the image to the right, where the balanced equation is:CH4 + 2 O2 → CO2 + 2 H2O.Here, one molecule of methane reacts with two molecules of oxygen gas to yield one molecule of carbon dioxide and two molecules of water. Stoichiometry measures these quantitative relationships, and is used to determine the amount of products/reactants that are produced/needed in a given reaction. Describing the quantitative relationships among substances as they participate in chemical reactions is known as reaction stoichiometry. In the example above, reaction stoichiometry measures the relationship between the methane and oxygen as they react to form carbon dioxide and water.Because of the well known relationship of moles to atomic weights, the ratios that are arrived at by stoichiometry can be used to determine quantities by weight in a reaction described by a balanced equation. This is called composition stoichiometry.Gas stoichiometry deals with reactions involving gases, where the gases are at a known temperature, pressure, and volume and can be assumed to be ideal gases. For gases, the volume ratio is ideally the same by the ideal gas law, but the mass ratio of a single reaction has to be calculated from the molecular masses of the reactants and products. In practice, due to the existence of isotopes, molar masses are used instead when calculating the mass ratio.