DHS PS Ch 19 (2018/2019)
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Change of one or more substances converted into new substances describes a ______ ________? | show 🗑
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| Substances that combine or change in a chemical reaction are ____? | show 🗑
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| show | products
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| show | Conservation of Mass
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| show | numbers which represent the number of units of each substance in a reaction
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| show | use the correct amounts of reactants to predict the amounts of products produced.
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| show | number which represents the number of atoms in a molecule of a particular element
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| In a chemical equation what side of the will you find the products? | show 🗑
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| show | to the left of the arrow
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| In order for an equation to be balanced, the same number of ____ must be on each side of the equation. | show 🗑
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| Whom is known as the father of modern chemistry? | show 🗑
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| What type of chemical equation has the same number of atoms of each element on each side of the equation? | show 🗑
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| A way to describe a chemical reaction using chemical formulas and symbols is? | show 🗑
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| How many atoms are present in 4 H2O? | show 🗑
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| show | 0.7g
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| show | The same number of atoms of each element is on both sides of the equation.
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| Correct coefficient for mercury (II) oxide in the following equation: ___ HgO=> 2Hg+ O2? | show 🗑
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| show | It exists as a diatomic molecule.
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| show | 2
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| show | 2Na+Br2=2NaBr
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| show | 3O2
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| show | 1,2,2,1
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| An insoluble compound that comes out of solution during a double displacement reaction is called a? | show 🗑
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| General formulas represents a single-displacement reaction? | show 🗑
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| What type of reaction is shown in the following chemical equation: NH3+HCl=>NH4Cl? | show 🗑
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| show | decomposition
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| show | synthesis
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| What type of reaction produces a precipitate? | show 🗑
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| show | Synthesis
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| show | Compound --> element + element
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| show | synthesis
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| As a result of the experiments of Lavoisier, you know that in a chemical reaction the mass of the products ______. | show 🗑
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| A substance that speeds up a chemical reaction without being permanently changed itself is a(n)______. | show 🗑
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| Rust forming on a car body would be an example of __ __________ ______________? | show 🗑
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| show | Inhibitors
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| Symbols in chemical equation means "produces," "yields", or "forms" | show 🗑
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| show | Exergonic, Exothermic
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| If heat must be added to a chemical reaction for the reaction to take place, the reaction is ______. | show 🗑
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| The energy required to break the original bonds is less than engergy released when new bonds form in a(n) | show 🗑
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| In a chemical equation, the symbol that means dissolved in water is ______. | show 🗑
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| The type of reaction that produces more energy than is required is called _____. | show 🗑
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| If heat must be added to a chemical reaction for the reaction to take place, the reaction is _____. | show 🗑
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| show | Single-displacement
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| show | Decomposition
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| show | Inhibitors
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| show | Exothermic
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| According to the law of conservation of mass, how does the mass of the products in a chemical reaction compare to the mass of the reactions? | show 🗑
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| show | Precipitate
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| show | Synthesis reaction
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| show | Chemical bonds
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| The process by which hydrogen and oxygen form water can be classified as a _____. | show 🗑
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| TRUE/FALSE: An ice cube melts into liquid water is an example of a chemical reaction. | show 🗑
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| show | Double-displacement
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| show | To speed up a reaction
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| show | endergonic
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| A change in which one or more substances are converted into new substances is called a _____. | show 🗑
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| show | reactants --> products
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| show | Matter cannot be created or destroyed, but is conserved.
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| show | 6g
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| The symbol (s)used in a reaction stands for a _____. | show 🗑
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| The symbol (l) used in a reaction stands for a _____. | show 🗑
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| show | gas
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| The symbol (aq) used in a reaction stands for _____. | show 🗑
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| What is the function of coefficients in a chemical equation? | show 🗑
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| show | subscript
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| show | balanced chemical equation
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| show | to satisfy the law of conservation of mass
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| show | coefficients
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| show | 1
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| The physical forms in which all matter naturally exists, solid, liquid, and gas, are called _____. | show 🗑
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| show | combustion reaction
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| show | whenever something burns : fireworks, candle, campfire, engine, furnace, grill, etc.
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| show | synthesis
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| TRUE/FALSE: When H2O is broken down into hydrogen and oxygen gases, a decomposition reaction takes place. | show 🗑
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| Most decomposition reactions require the use of _____, _____, or _____. | show 🗑
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| When copper wire is placed in a solution of silver nitrate to produce a copper nitrate sloution and silver on the wire, this is an example of a _____ reaction. | show 🗑
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| show | They are the least active of the metals on the list.
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| A _____ reaction occurs when barium nitrate reacts with potassium sulfate to produce barium sulfate and potassium nitrate. | show 🗑
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| show | double-displacement reaction
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| show | chemical bond
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| Chemical reactions that release energy are called a(n) __________ reaction. | show 🗑
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| Chemical reactions that release energy, primarily in the form of thermal energy are _____. | show 🗑
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| show | endergonic
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| Chemical reactions that require energy in the form of thermal energy are _____. | show 🗑
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| A _____ is a substance that speeds up a chemical reaction without being permanently changed itself. | show 🗑
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| A substance used to slow down a chemical reaction is a(n) _____. | show 🗑
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| All chemical reactions ______ or _____ energy. | show 🗑
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| show | thermal, light, sound, & electricity
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| show | endergonic (requires light)
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| show | exergonic (produces light and sound), exothermic (produces heat)
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| A firefly would be an example of _____. | show 🗑
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| An instant cold pack is an example of what type(s) of reaction? | show 🗑
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| show | exothermic
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| show | chemical
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| If a precipitate, water, or a gas forms when two ionic compounds in solution are combined, the reaction is a(n) _____ reaction. | show 🗑
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| A substance that prevents certain chemical reactions is a(n) _____. | show 🗑
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| When two or more substances combine in a chemcial reaction to form another substance, a(n) _____ reaction has taken place. | show 🗑
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| The breakdown of a substance into two or more simpler substances is a(n) _____ reaction. | show 🗑
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| In a chemical equation, the substances that react are called _____. | show 🗑
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| show | catalyst
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| A reaction that requires energy in the form of heat is a(n) _____ reaction. | show 🗑
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| When one element replaces another in a compound, a(n) _____ reaction has occurred. | show 🗑
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| If the energy released in a chemical reaction is primarily in the form of heat, that reaction is a(n) ______ reaction. | show 🗑
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| show | coefficients
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| If the number of atoms of each element on the left side of an equation is equal to the number of atoms of each element on the right side of the equation, the equation is ______. | show 🗑
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| show | products
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| An insoluble solid that forms when two ionic compounds in solution are combined is a(n) ______. | show 🗑
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| What is the symbol for a solid? | show 🗑
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| What is the symbol for a gas? | show 🗑
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| show | (l)
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| show | (aq)
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| Why is it important to show chemical reactions in a balanced form? | show 🗑
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| show | exothermic
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| show | endothermic
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| Frost formed on the outside of the beaker holding the reacting substances causing a)n) ______. | show 🗑
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| show | temperature, concentration, volume/pressure, and surface area
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| show | equilibrium
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| Carbon Dioxide continually escapes and reenters soda is an example of ____________ _______________. | show 🗑
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| show | endothermic
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| show | endergonic
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| A chemical reaction inside the abdomen of a firefly produces light is an _______________ reaction. | show 🗑
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| Coal power plants burn coal to produce energy. This is an example of an ______________ reaction. | show 🗑
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| Oxidation involves the __________ of electrons. | show 🗑
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| show | gain
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| All combustion reactions require __________ . | show 🗑
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| show | mole
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| show | molar mass
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| If you increase the temperature of a chemical reaction, the rate of reaction ________________. | show 🗑
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| If you increase the concentration of a chemical in a chemical reaction, the rate of reaction ________________. | show 🗑
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| show | decreases
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| If you increase the pressure of a chemical reaction, the rate of reaction ________________. | show 🗑
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| show | increases
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pherriman
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