Semester II Exam Review Questions
... 13. What is the boiling point temperature for Yummygum when the external pressure is 75 atmospheres? 14. What is the freezing point temperature for Yummygum when the external pressure is 70 atmospheres? 15. If you were to have a container of Yummygum in your kitchen, in what state (phase of matter) ...
... 13. What is the boiling point temperature for Yummygum when the external pressure is 75 atmospheres? 14. What is the freezing point temperature for Yummygum when the external pressure is 70 atmospheres? 15. If you were to have a container of Yummygum in your kitchen, in what state (phase of matter) ...
Honors-Final-Review-2014
... d. conversion factor determined using balanced equation e. amount of product measured in the lab f. reactant not totally used up in the lab g involves mass relationships in a chemical reaction h. combined mass of all the atoms in a compound. i. this determines the maximum amount of product that will ...
... d. conversion factor determined using balanced equation e. amount of product measured in the lab f. reactant not totally used up in the lab g involves mass relationships in a chemical reaction h. combined mass of all the atoms in a compound. i. this determines the maximum amount of product that will ...
SAMPLE PAPER Class - XII SUBJECT
... Ferric hydroxide sol gets coagulated on addition of sodium chloride solution (b) Cottrell’s smoke precipitator is fitted at the mouth of the chimney used in factories. (c) Physical adsorption is multilayered, while chemisorption is monolayered. Q.17. Nitro group increases the reactivity of chloroben ...
... Ferric hydroxide sol gets coagulated on addition of sodium chloride solution (b) Cottrell’s smoke precipitator is fitted at the mouth of the chimney used in factories. (c) Physical adsorption is multilayered, while chemisorption is monolayered. Q.17. Nitro group increases the reactivity of chloroben ...
CHEM_1305_Practice_Exam_2
... A) Solid sodium carbonate decomposes to give solid sodium oxide and carbon dioxide gas. B) Sodium carbonate decomposes to form sodium oxide and carbon dioxide. C) Sodium oxide combines with carbon dioxide to form sodium carbonate. D) Sodium oxide is decomposes to give sodium carbonate and carbon dio ...
... A) Solid sodium carbonate decomposes to give solid sodium oxide and carbon dioxide gas. B) Sodium carbonate decomposes to form sodium oxide and carbon dioxide. C) Sodium oxide combines with carbon dioxide to form sodium carbonate. D) Sodium oxide is decomposes to give sodium carbonate and carbon dio ...
Chemical and Physical Property Unit Test
... a2. What must often be added to increase the speed or ability of two substances to react? A. a bigger container B. adding heat C. more substances D. adding water a3. What kinds of energy are produced by bright fireworks? A. electricity, steam B. motion, gravity C. sound, magnetism D. light, heat b5. ...
... a2. What must often be added to increase the speed or ability of two substances to react? A. a bigger container B. adding heat C. more substances D. adding water a3. What kinds of energy are produced by bright fireworks? A. electricity, steam B. motion, gravity C. sound, magnetism D. light, heat b5. ...
August 2010 Regents Exam part 1
... the reaction increases because (1) fewer particle collisions occur (2) more effective particle collisions occur (temp = kinetic energy, higher temp = more KE, that means more collisions. (3) the required activation energy increases (4) the concentration of the reactants increases ...
... the reaction increases because (1) fewer particle collisions occur (2) more effective particle collisions occur (temp = kinetic energy, higher temp = more KE, that means more collisions. (3) the required activation energy increases (4) the concentration of the reactants increases ...
13.2 Chemical Formulas
... How do chemists know how many atoms of each element are needed to build a molecule? For ionic compounds, oxidation numbers are the key. An element’s oxidation number is the number of electrons it will gain or lose in a chemical reaction. We can use the periodic table to find the oxidation number for ...
... How do chemists know how many atoms of each element are needed to build a molecule? For ionic compounds, oxidation numbers are the key. An element’s oxidation number is the number of electrons it will gain or lose in a chemical reaction. We can use the periodic table to find the oxidation number for ...
CHEM 150
... a. at any temperature the vapor pressure of chloroform is greater than that of water b. chloroform is less volatile than water c. both (a) and (b) are true d. both (a) and (b) are false ____ 28. Which regions of a heating curve correspond to regions where only a single phase of a material is present ...
... a. at any temperature the vapor pressure of chloroform is greater than that of water b. chloroform is less volatile than water c. both (a) and (b) are true d. both (a) and (b) are false ____ 28. Which regions of a heating curve correspond to regions where only a single phase of a material is present ...
word-doc Practice for the final exam!
... d. pure substance e. solid 3. If matter is uniform throughout, cannot be separated into other substances by physical processes, but can be decomposed into other substances by chemical processes, it is ________. a. a heterogeneous mixture b. an element c. a homogeneous mixture d. a compound e. a mixt ...
... d. pure substance e. solid 3. If matter is uniform throughout, cannot be separated into other substances by physical processes, but can be decomposed into other substances by chemical processes, it is ________. a. a heterogeneous mixture b. an element c. a homogeneous mixture d. a compound e. a mixt ...
Measuring and Calculating
... AB + CD AD + CB A + B AB AB A + B reaction with oxygen to produce oxides ...
... AB + CD AD + CB A + B AB AB A + B reaction with oxygen to produce oxides ...
Name - cloudfront.net
... How is the ideal gas law usually written? The combined gas law relates which items together? If a balloon is squeezed, what happens to the pressure of the gas inside the balloon? If the volume of a container of gas is reduced, what will happen to the pressure inside the container? In general, for a ...
... How is the ideal gas law usually written? The combined gas law relates which items together? If a balloon is squeezed, what happens to the pressure of the gas inside the balloon? If the volume of a container of gas is reduced, what will happen to the pressure inside the container? In general, for a ...
Chemical reaction
A chemical reaction is a process that leads to the transformation of one set of chemical substances to another. Classically, chemical reactions encompass changes that only involve the positions of electrons in the forming and breaking of chemical bonds between atoms, with no change to the nuclei (no change to the elements present), and can often be described by a chemical equation. Nuclear chemistry is a sub-discipline of chemistry that involves the chemical reactions of unstable and radioactive elements where both electronic and nuclear changes may occur.The substance (or substances) initially involved in a chemical reaction are called reactants or reagents. Chemical reactions are usually characterized by a chemical change, and they yield one or more products, which usually have properties different from the reactants. Reactions often consist of a sequence of individual sub-steps, the so-called elementary reactions, and the information on the precise course of action is part of the reaction mechanism. Chemical reactions are described with chemical equations, which symbolically present the starting materials, end products, and sometimes intermediate products and reaction conditions.Chemical reactions happen at a characteristic reaction rate at a given temperature and chemical concentration. Typically, reaction rates increase with increasing temperature because there is more thermal energy available to reach the activation energy necessary for breaking bonds between atoms.Reactions may proceed in the forward or reverse direction until they go to completion or reach equilibrium. Reactions that proceed in the forward direction to approach equilibrium are often described as spontaneous, requiring no input of free energy to go forward. Non-spontaneous reactions require input of free energy to go forward (examples include charging a battery by applying an external electrical power source, or photosynthesis driven by absorption of electromagnetic radiation in the form of sunlight).Different chemical reactions are used in combinations during chemical synthesis in order to obtain a desired product. In biochemistry, a consecutive series of chemical reactions (where the product of one reaction is the reactant of the next reaction) form metabolic pathways. These reactions are often catalyzed by protein enzymes. Enzymes increase the rates of biochemical reactions, so that metabolic syntheses and decompositions impossible under ordinary conditions can occur at the temperatures and concentrations present within a cell.The general concept of a chemical reaction has been extended to reactions between entities smaller than atoms, including nuclear reactions, radioactive decays, and reactions between elementary particles as described by quantum field theory.