Bonding
Matter Matters
Balancing Act
Let's Get Physical (Properties)
How much?
100
What is a covalent bond?
A covalent bond is a bond where the two atoms involved share electrons in order to give them both a full octet
100
List the 3 phases of matter and give one characteristic of each
Solids- definite shape and volume, high density, definite melting point Liquids- no definite shape, definite volume, high density, surface tension, capillary action gases- no definite shape or volume, low density, compressible
100
Balance the equation: __Br2 + __NaI --> __NaBr + I2
1 Br2 + 2 NaI --> 2 NaBr + 1 I2
100
Which is not a physical property? Melting point boiling point smell it reacts with O2 color
it reacts with O2
100
Calculate the number of grams in 8.05 moles of H3PO4
788.8 g H3PO4
200
What happens during the formation of an ionic bond in lithium fluoride?
Lithium donates an electron to fluorine and forms and ionic bond.
200
What is kinetic energy?
Kinetic energy is the energy that objects have when they are in motion.
200
Balance the following: __ Al(OH)3 + __ H2CO3 --> __Al2(CO3)3 + __ H2O
What is 2 Al(OH)3 + 3 H2CO3 --> 1 Al2(CO3)3 + 6 H2O
200
Name three properties of an acid and 3 properties of a base
Acids- sour, corrosive, produce H+ when reacting with metal, turns blue litmus paper red, conducts electricity Base- bitter, slippery, produces OH- when reacting with metals, turns red litmus paper blue, conducts electricity
200
Calculate the number of moles in 489 g of LiCl
11.5 moles
300
Which of the following atoms will form a covalent bond? S and P, K and Cl, Mg and Cl, C and O
S and P, C and O
300
Explain how thermal energy and kinetic energy are involved when a liquid is being heated to boiling
Thermal energy is transferred into the liquid which then increases the kinetic energy and temperature of the liquid until the liquid undergoes a phase change into the gas phase.
300
Calculate the molecular mass of C8H10N4O2 (remember units)
194.1915 g/mol
300
In which phase do molecules have the least kinetic energy? How do you know?
Solid phase because kinetic energy describes the energy of moving particles, however the particles in solids are not moving very much.
300
a. How many moles of NaBr will be produced when 0.98 g of bromine reacts according to the equation: __Br2 + __NaI --> __NaBr + I2
0.012 mol NaBr
400
Which compound will be harder to separate into its individual elements? NaCl or CO2? Why?
NaCl, because ionic bonds are stronger than covalent bonds and NaCl is an ionic compound while CO2 is a covalent compound
400
Is blood a mixture or a compound? Give two reasons and use complete sentences.
Mixture because blood has multiple components and can be separated into its parts by physical processes
400
Calculate the molecular weight for C8H9NO2 (remember units)
151.1633 g/mol
400
True/false- Kinetic energy and thermal energy are only important to consider in phase changes where kinetic energy increases
False
400
b. Phosphorous will react with bromine to produce phosphorous tribromide (PBr3). How many moles of PBr3 will be produced if 0.87 g of Br2 is reacted? __P4 + __Br2 → __PBr3
.0036 mol PBr3
500
Predict the chemical formulas for the following; (must have all correct to get points) Mg and I Be and S Na and O Al and Br
MgI2 BeS Na2O AlBr3
500
How can you separate the components of a mixture? Make sure to use the terms “physical” or “chemical” process.
You can separate the components of a mixture using physical processes, you do not need to use chemical processes.
500
How many moles are in 1.80kg of C6H12O6?
100 moles
500
What happens to the volume of a substance as the mass increases?
As mass increases, volume increases.
500
c. How many moles of hydrogen will be produced if 6.44 g of CaH 2 reacts according to the equation: __CaH2 + __H2O --> __Ca(OH)2 + __H2?
.306 moles H2
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