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Molar Mass
Empirical Formula
Mass Percent
Stoichiometry
Odds and Ends
100
The units on molar mass.
What is g/mol.
100
Define empirical formula.
What is "lowest whole number ratio of elements in a compound."
100
The equation for mass % of an element in a compound
What is (part/whole) x 100 = %
100
The numbers added to balance a chemical equation are named
What is COEFFICIENTS
100
The value of Avogadro's number.
What is 6.02 x 10^23
200
The molar mass of sulfur dioxide gas.
What is 64.1 g/mol
200
One of these is NOT an empirical formula: CO2 NH3 Ba(NO3)2 C2H4
What is C2H4
200
The compound below that has the highest mass % C. HCN CH4 CO2 CS2
What is CH4
200
This is what the coefficients in a balanced chemical equation represent.
What is a ratio of MOLES
200
The reactant that is not fully consumed in a chemical reaction is called this.
What is the excess reactant.
300
In order to convert grams to moles, this calculation must be done.
What is divide by molar mass.
300
A compound contains 0.046 mol S and 0.092 mol O. It's empirical formula is...
What is SO2
300
The mass percent of nitrogen in ammonia gas equals...
What is 82.4%
300
H2 + O2 --> H2O If 3.00 mole oxygen reacts completely with hydrogen, what mass of water is produced?
What is 108g.
300
The mass of 0.00500 mole Al
What is 0.135 g.
400
The compound from the list that has a MM equal to 30 g/mol. CH3OH C2H6O C2H6 C2H4 HCN
What is C2H6.
400
The empirical formula of a compound that is composed of 2.41g C, 0.601g H and 1.60g O.
What is C2H6O
400
The mass % N in magnesium nitrate equals...
What is 18.9%
400
Define theoretical yield.
What is "the predicted amount of product based on a given amount of reactant."
400
1.00g of which of these elements contains the greatest number of atoms? Fe C Al Pb He
What is He.
500
The molar mass of aluminum sulfate.
What is 342 g/mol
500
A compound that has an empirical formula of CH but a molar mass equal to 104g/mol
What is C8H8
500
The compound potassium chlorate decomposes on heating, releasing oxygen and the remaining solid compound is potassium chloride. What happens to % K in the compound during the decomposition?
What is it INCREASES. % K in KCl is higher than % K in KClO3.
500
P4 + Cl2 --> PCl5 If 2 mol P4 and 2 mol Cl2 are reacted, the limiting reactant is _____.
What is Cl2.
500
The balanced equation for the combustion of butane (C4H10)
What is 2 C4H10 + 13 O2 --> 8 CO2 + 10 H2O