Formula
These compounds are made up of two nonmetals
covalent compounds
What is Avogadro's number?
6.02x1023 small things are equal to moles
What are some indicators of a chemical reaction?
A. Light or heat is produced
B. Production of gas
C. Production of a solid
D. All of the above
D
Type and finish the reaction
Cs2O -->
decomp
2Cs2O --> 4Cs (s) + O2 (g)
"2 moles of Na for every 2 moles of P" is an example of a ________________
mole ratio
these ions are ___________ and are nonmetals if they are not polyatomic.
negative (anions)
What type of problem are moles to small things? What would you use to convert?
one step
avogadro's number
What state would you label Sodium Nitrate?
A. Solid
B. Liquid
C. Gas
D. Aqueous
D.
Type and finish the reaction
Al + O2 -->
synthesis
4Al + 3O2 --> 2Al2O3 (s)
What are used to find mole ratios?
A. reactants
B. states
C. products
D. coefficients
D
What is the correct name for CsOH?
A. Cesium oxygen hydrogen
B. Cesium Hydroxide
C. Cesium (1) Oxide
D. Cesium Hydride
B
What type of problem is it when you are asked to go from mass to small things? What conversion factors do you need to use and it what order?
two step
mass to moles first with molar mass
moles to small things with avogadros number
Balance N2O5 --> N2 + O2
2N2O5 --> 2 N2 + 5O2
Write the reactants of every type of reaction we have talked about
Synthesis (two free elements)
Decomposition (one compound)
SR (one free element and a compound)
DR (two compounds)
Balance the reaction and tell me the ratio of moles of Aluminum for the # of moles of Aluminum Oxide
Al + O2 --> Al2O3
4Al + 3O2 --> 2Al2O3
there are 4 moles of aluminum for every 2 moles of aluminum oxide
Ionic or covalent AND give me the formula of Lead (II) Hydroxide.
Ionic
Pb(OH)2
What is the molar mass of Aluminum Chloride?
AlCl3
Al-1 (26.98)=26.98
Cl-3(35.45)=106.35
133.33 g/mol
two free elements -->
What type of reaction?
Synthesis
Type and finish reaction
Mg + HCl -->
SR
Mg + 2HCl --> H2(g) + MgCl2(aq)
How many moles of O2 are needed to produce 28.36 moles of N2O5?
N2 + O2 --> N2O5
2N2 + 5O2 --> 2N2O5
28.36 moles of N2O5/1 x5 moles of O2/2 moles of N2O5= 70.90 moles of O2
Ionic or covalent AND give me the name of PCl4
covalent
phosphorus tetrachloride
How many formula units are in 5.893 grams of AlCl3?
5.893 g/1 x 1mol/133.33 g x 6.02x1023 f.u/ 1 mol =
2.66 x1022 formula units
Explain how to check if a single replacement reaction occurs and what happens for there to be a no reaction?
free element has to be higher than the one in the compound.
if not no reaction
Type and finish the reaction
H2SO4 + Ag2S -->
DR
H2SO4 + Ag2S --> H2S (g) + Ag2SO4(s)
How many grams of O2 are needed to produce 11.89 moles of N2O5?
N2 + O2 --> N2O5
2N2 + 5O2 --> 2N2O5
11.89 moles of N2O5/1 x5 moles of O2/2 moles of N2O5 x 32 g O2 /1 mole O2= 951.20 grams of O2