Stoichiometry
Mole Relationships I
Mole Relationships II
Chemical Equations
Chemical Reactions
100

the section of chemistry that involves using relationships between reactants and/or products in a chemical reaction to determine desired quantitative data

What is stoichiometry?

100
The number of grams in one mole of carbon
What is 12 grams?
100
The number of grams in one mole of hydrogen gas
What is 2?
100
Those substances in a chemical reaction that exist before the reaction takes place
What are reactants?
100
A reaction in which two simple substances combine to form a new, more complex substance
What is combination/synthesis?
200

The mass of a formula, numerically equal to the sum of the atomic masses, but expressed in grams

What is gram formula mass?

200
The number of moles in 22 g of carbon
What is 1.8 moles?
200
The number of moles in 33.0 g of hydrogen gas?
What is 16.5?
200
Those substances in a chemical reaction that exist after the reaction is finished
What are products?
200
A reaction in which a complex substance is broken into two or more simple substances
What is decomposition?
300
The mass of a mole of a compound in grams/mole
What is molar mass?
300
The volume in L of 2.0 moles of O2 at STP
What is 44.8 L?
300
The volume in L of 3.9 moles of He at STP
What is 87 L?
300
Number placed in front of each formula in a balanced chemical equation
What is a coefficient?
300
A reaction in which a free element becomes an ion and an ion becomes a free element
What is single replacement?
400
The numerical value of Avogadro’s number
What is 6.022 x 1023?
400
The number of atoms in 1.4 moles of carbon
What is 8.4 x 1023 atoms?
400
The number of atoms in 1.4 x 10-20 moles of hydrogen gas
What is 1.7 x 104 atoms?
400
Placing coefficients in a chemical equation to ensure that the number of each type of atom in the reactants is equal to the number in the products
What is balancing an equation?
400
A reaction in which the cation of one substance exchanges with the cation of the other substance
What is double replacement?
500
The smallest collection of atoms from which the formula of a compound can be established
What is a formula unit?
500
The volume in L of 20. g of O2 at STP
What is 14 L?
500
The number of atoms found in 19.0 g of hydrogen gas
What is 5.72 x 1024 atoms?
500
The symbol placed above the reaction arrow to indicate that energy/heat is needed for the reaction to occur
What is delta, Δ?
500
The four main indications that a chemical reaction has occurred
What are temperature change, gas production, formation of a precipitate, or color changes?
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