Misc. 1
Unit used for measuring volume of a liquid
mL or L
Charge of proton, neutron & electron
proton - positive
neutron - no charge/neutral
electron - negative
Conversion factor used to go from moles to grams
1 mole = molar mass
Zn is an example of a _________ while ZnCl2 is an example of a ____________
element, compound
Name the type of reaction
H2 + KCl --> K + HCl
Single Displacement
Definition of matter
has mass & takes up space
Number of protons in chlorine
17
1.39 moles H2O
Density of a 30mL of a liquid that has a mass of 10 grams. Include units in your answer.
0.333 g/mL
Predict the products & balance the equation
Mg + N2 -->
3Mg + N2 --> Mg3N2
Symbol for Mg when it has lost 2 electrons
Mg+2
Number of electrons in Al+3
10 electrons
Convert 2 moles of C2H4 to molecules
1.204 X 1023
List the state symbols for each state of matter in a chemical equation
(s), (l), (g), (aq)
Name two indications that a chemical reaction has occurred
- evolution of energy as heat/light
- production of a gas
- formation of a precipitate
- color change
Number of significant figures in 0.005086020
7 sig figs
Number of neutrons in copper when the mass number is 64
35
Convert 0.25 moles of nitrogen to grams
7.005 grams
Calculate the percent composition of oxygen in Ca(OH)2
43.24% Oxygen
Name the type of rxn, predict the products & balance the equation
AlCl3 + Br2 -->
Single Displacement
2AlCl3 + 3Br2 --> 2AlBr3 + 3Cl2
Difference between physical and chemical changes
AND give an example of each
Chemical - one or more substances are altered into NEW substances
Physical - substance is still essentially the same substance (i.e. a phase change)
Atomic number, # of protons, # of neutrons, # of electrons for phosphorus
Mass number is 31
atomic number - 15
protons - 15
neutrons - 16
electrons - 15
Convert 85g of Ca3(PO4)2 to moles
0.274 moles
A compound contains 87.4% nitrogen and 12.6% hydrogen. If the molecular mass of the compound is 32.05 g/mol, what is the molecular formula?
N2H4
Name the type of rxn, predict the products & balance the equation
BaSO4 + Mg(NO3)2
Double Displacement
BaSO4 + Mg(NO3)2 --> Ba(NO3)2 + MgSO4