The Atom and its organization
Reactions
Scientific Processes
Gas Laws
Grab Bag
100
What is the atomic number and atomic mass of Carbon?
Atomic # - 6 Atomic mass - 12.01
100
An endothermic reaction ____________ heat while an exothermic reaction _____________ heat.
endo - absorbs exo - releases
100
What re the base units to measure for mass, volume, and distance?
mass - g volume - L distance - m
100
If you heat a fixed volume of gas what happens to the pressure?
It increases.
100
Stat the law of conservation of mass.
Matter can not be created or destroyed.
200
What subatomic particles are in an atom, what are there charges, and were are they located?
proton - + located in nucleus neutron is neutral located in nucleus electron is negative orbits nucleus in electron cloud
200
When an atom gains or looses an electron it becomes an ________. If chlorine gains an electron what will its charge become?
ion - negative
200
How does a hypothesis become a theory?
When it is supported by many experiments and observations.
200
The pressure exerted on a 6.7 L sample of hydrogen gas is increased from 1.3 atm to 2.7 atm. What will the final volume of the sample be?
3.23 L
200
On a periodic table what are the columns (vertical) and the rows (horizontal) called?
columns - groups rows - periods
300
How would you write out dioxygen tetrahydride?
O2H4
300
AB ----> A + B Which side is the reactants, which is the products?
the left is the reactants, the right is the products
300
What are the three ways you could make a solid dissolve more quickly in a liquid?
Heat, stir, add more liquid.
300
At 48 C the pressure of a sample of gas is 640 mmHg. What will the pressure be at 22 C?
588.16 mmHg
300
Is heat absorbed or released when ice melts?
absorbed
400
What are the outermost electrons of an atom called?
valence electrons
400
When electrons are transfered from one atom to another ________ bonds are formed. When electrons are shared between atoms _________ bonds are formed.
transfered - ionic shared - covalent
400
What are the six phase changes that occur between solids, liquids and gasses?
evaporation, condensation, sublimation, deposition, melting, freezing
400
A flexible container holds a volume of 2.8 L of xenon at 22 C. What will the volume be at 42 C ?
3.0 L
400
Describe the motion of molecules that make up a solid.
They vibrate in place.
500
A mole is a unit of _________ . There are __________ atoms of an element in 1 mole. (fill in the blanks)
measurement 6.02 x 10^23
500
Give an example of a physical change and an example of a chemical change.
500
How does accuracy differ from precision?
accuracy - close to the true value precision - exact measurement
500
What is the mass in grams of bromine in a 2 L container at 23 C and 780 mmHg ?
13.5 g
500
List all the metric prefixes in order from largest to smallest starting with M and ending with micro.
mega, kilo, hecta, deka, deci, centi, milli, micro
M
e
n
u