moles
Mole ratio of Ammonium phosphate and zinc phosphate
2(NH4)3PO4(aq) + 3Zn(NO3)2(aq) --> 6NH4NO3(aq) + Zn3(PO4)2(s)
2:1
2 H2O --> H2 + O2
Decomp
How do you know if an equation is balanced?
If the number of atoms of all of the substances are the same on both sides of the balanced equation. The amount of reactant's are equal to the number of products.
A compound is 92.3% carbon and 7.7% hydrogen
CH
In an Oxidation Reduction reaction Electrons are..
Transferred
How many grams are there in 7.40 moles of AgNO3?
1256.87 g
CuCl2 + H2S → CuS + 2HCl
Double
___Fe + ___H2S04 → ___Fe2(SO4)3 + ___H2
2,3,1,3
A compound has a molecular mass of 54 and an empirical formula of C2H3. what is the molecular formula?
C4H6
the element/ isotope that moles are based off of
Carbon 12
How many grams of AlCl3 will be produced if 2.50 moles of Al react
__2_Al + __3_Cl2 --> __2_AlCl3
333g of AlCl3
2Sb + 3Cl2 → 2SbCl3
Syntheses
___C2H6 + ___O2 → ___H2O + ___CO2
2,7,6,4
What is the molecular formula of a compound with the empirical formula of P2O5 and mass of 284
P4O10
Find the molar mass of Cu(NO3)3
250g per mole
16 Cr(s) +3 S8 --> 8 Cr2S3
Using the above equation, determine the number of moles of sulfur, S8 that is necessary to react with 6.215 moles of chromium, Cr.
1.16mol S8
Types of reactions: 2Mg+ O2 --> 2MgO
Synthesis and Combustion
NaOH + Cu(NO3)2 --> Cu(OH)2 + NaNO3
2,1,1,2
A compound Contains 40% Ca, 12% C and 48% O by mass. What is the empirical formula
CaCO3
Name the 2 types of reactions for this equation
2Mg + O2 --> 2MgO
Synthesis and Combustion
How many atoms are in 1.50 moles of Hg
9.03x1023 atoms Hg
7O2 + 2C2H6 → 6H2O + 4CO2
Combustion
Balance
2C6H6 + 15O2 --> 12CO2 + 6H2O
Avogadro's Number is for when you are trying to find what 3 units?
Molecules, Atoms, and Particles
Law of conservation of mass
that in a chemical reaction mass is neither created nor destroyed.