Anything
Empirical Formulas
Conversions with Compounds
Conversions with Equations
Limiting Reactants
100
Avagadro's number is...
What is 6.02x10^23
100
The empirical formula for C6H8
What is C3H4
100
Which is the mass of 8 moles of sodium chloride?
What is 468 Grams
100
Which is the correct mole ratio of K3PO4 to KNO3 in the chemical reaction Mg(NO3)2 + K3PO4 --> Mg3(PO4)2 + KNO3?
What is 1:3
100
The limiting reactant is the chemical that produces the _____ amount of product.
What is least
200
The generic/basic set-up for a moles of A to grams of A conversion...
What is Given mol A x (molar mass A/ 1 mol A)
200
Which term is described as the percent by mass of any element in a compound? a. hydrate b.empirical formula c. molecular formula d. percent composition
What is D, percent composition
200
Calculate the number of molecules in 4.0 mol H2O.
What is 2.4 x 10^24
200
How many moles of KBr will be produced from 7 moles of BaBr2? BaBr2 + K2SO4 --> KBr + BaSO4
What is 14 moles KBr
200
The steps that must be followed in order to determine the limiting reactant.
What is perform a gram --> gram conversion twice, once for each reactant but to the same product each time.
300
How many moles of atoms are in one mole of AlPO4?
What is 6 moles
300
The substances that have the same empirical formula are: A) CH2O B) C6H12O6 C) C2H4O2 D)C7H5O2
What are A and B
300
Copper (Cu) is a transition element used in the making of coins. Calculate the mass in grams of 0.0420 moles of copper.
What is 2.67 g
300
How many grams of water are produced when 2.50 mol oxygen reacts with hydrogen? H2 + O2 --> H2O
What is 90.0 g H2O
300
How many moles chlorine should be produced if 84.2 grams of aluminum chloride and 68.4 grams bromine are combined? 2AlCl3 + 3 Br2 --> 2 AlBr3 + 3 Cl2
What is 0.428 moles Cl2
400
What is the molar mass of Ca(OH)2?
What is About 74 g/mol
400
Which is the percent composition of sodium in the compound NaBr
What is 22.3 %
400
How many molecules are in 3.6 grams of NaCl?
What is 3.7 x 10^22 molecules
400
How many grams of H2O will be produced if 750 grams of Fe are produced? Fe3O4 + 4H2 --> 3Fe + 4H2O
What is 322 g H20
400
Phosphorus pentachloride is formed when 17.2 g of chlorine gas react with 23.2 g of solid phosphorus (P2). Determine the reactant that is in excess.
What is phosphorus
500
A student said that 20 moles of Al would be produced from 20 moles of Al2O3 for the reaction: Al2O3 --> Al + O2 What did they do wrong, and what is the correct answer?
What is forgot to balance the equation (use the correct mole ratio) and 40 mol.
500
Which is the formula for a compound that contains 64.75 g nitrogen and 185.25 g oxygen?
What is N2O5
500
A balloon contains 4.50 x10^22 atoms of helium (He2) gas. Calculate the mass of helium in grams.
What is 0.58g
500
What is the mass of potassium chloride when 2.50 g of potassium reacts with excess of chlorine gas? (You need to make the balanced equation first)
What is 4.77 g
500
In this chemical reaction, 6 moles of each of the reactants is combined. Mg + N2 --> Mg3N2 a) Which is the limiting reagent? Which is the excess reagent? b) How many moles of magnesium nitride can be made? c) How many moles of excess reagent will be left over?
What is a) Magnesium is limiting and nitrogen is excess b) 2 moles of product are formed c) Since 2 moles of nitrogen must be used, there will be 4 moles left over.
M
e
n
u