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Vocabulary
Mass-Mass Problems
Atoms, Moles, Molecules, Mass, Volume
Volume Problems
Limiting and Excess Reagents & Percent Yield
100
The starting substance in a chemical reaction
What are reactants
100
A stoichiometric computation in which the mass of the product is determined from the given mass of the reactants
What is mass-mass calcualation
100

In a chemical reaction, the atoms of a reactants are _______ as the products.

What is the same

100
What is the conversion factor if looking for VOLUME, and given moles?
What is 22.4 L/1 mol
100
the substance completely used up in a chemical reaction
What is the limiting reagent
200
A conversion factor derived from the coefficients of a balanced equation interpreted in terms of moles
What is mole ratio
200

In a chemical reaction the mass of the reactants is ________ as the products

What is the same

200

Volume is _____________ necessarily conserved in a chemical reaction.

What is not

200

If given mass, what is the flow conversions you would use to find volume, starting with: Mass G -->

What is Mass G--> Moles G --> Moles W --> Volume W

200
the substance left over after a reaction takes place
What is excess reagent
300
The calculation of quantities in a chemical reaction
What is stoichiometry
300

To calculate the number of grams produced in a reaction given grams of given what are the general conversion factors starting with: (grams G) X (1mol G/molar mass G) X

What is (grams G) X (1mol G/molar mass G) X (mol ratio) X (molar mass W/ 1 mol W)

300

If you could drop 24 atoms of copper into a beaker containing nitric acid, how many molecules of NO would be formed? 3 Cu + 8 HNO3 --> 3Cu(NO3)2 + 2NO + 4 H2O

What is 16

300
Given the reaction: 2 NO + O2 --> 2 NO2 If 10.5 L O2 react at STP, how many liters of NO2 are produced?
What is 21 L
300
the ratio of how much product is produced
What is percent yield
400
The amount of a substance that contains 6.02 X10^23 representative particles of a substance
What is a mole
400
How many grams of CO are needed to react with excess Fe2O3 to produce 630 g of Fe? The equation in this reaction is: Fe2O3 + 3 CO --> 3 CO2 + 2 Fe
What is 948 g CO
400
How many grams of Cu would be needed to react with 3.0 mol HNO3? 3 Cu + 8 HNO3 --> 3Cu(NO3)2 + 4 H2O
What is 71.43 g
400
How many liters of oxygen are required to react completely with 2.4 L of hydrogen to form water? 2 H2 + O2 --> 2 H20
What is 1.2 L
400
A reaction that has been calculated to produce 75 g of CuO actually produced 70 g of CuO. What is the percent yield?
What is 93.33 %
500
The actual amount of a product in a chemical reaction
What is actual yield
500
If 6.0 g of H2 are made to react with excess CO, how many grans of CH3OH can theoretically be produced according to the following equation? CO + 2 H2 --> CH3OH
What is 48 g
500

What can the coefficients in a chemical equation tell you?

What is number of molecules and moles/mole ratio.

500
How many liters of carbon dioxide at STP are produced when 70 g of calcium carbonate is heated according to the following equation: CaCO3 --> CaO + CO2
What is 15.68 L
500

A 500 g of Al2(SO4)3 is made to react with 475 g of Ca(OH)2. A total of 596 g of CaSO4 is produced. The balanced equation is : Al2(SO4)3 + 3Ca(OH)2 --> 2 Al(OH)3 +3CaSO4 What is the is the excess reagent?

What is Ca(OH)2