Create an account
All of the above (color and odor, melting and boiling points, malleability and hardness)
Which of the following are considered physical properties of a substance?
Mixtures can be separated physically, while compounds cannot.
What distinguishes a substance from a mixture?
There must be a change in chemical properties.
What must occur for a change to be a chemical reaction?
1.54 * 10^-10
The diameter of a carbon atom is 0.000000000154 m. What is this number expressed in scientific notation?
The density increases.
If the temperature of a piece of steel decreases, what happens to its density?
The mass of a neutron nearly equals the mass of a proton.
Which of the following is true about subatomic particles?
84|38 M 86|38 M 87|38 M
Which of the following sets of symbols represents isotopes of the same element?
The electrons move around the protons, which are at the center of the atom.
In Bohr's model of the atom, where are the electons and protons located?
How does the energy of an electron change when the electron moves clower to the nucleus?
If the spin of one electron in an orbital is clockwise, what is the spin of the other electron in that orbital?
They are inversely proportional to each other.
How are the frequency and wavelength of light related?
How many electrons does silver have to givve up in order to acieve a pseudo-noble-gas electron configuration?
What is the formula of the ion formed when phosphorus achieves a noble-gas electron configuration?
1s^2 2s^2 2p^6 3s^2 3p^6 3d^10 4s^2 4p^6 4d^10 5s^2 5p^6
What is the electon configuration of the iodide ion?
How many valence electrons are transferred from the nitrogen atom to potassium in the formation of the compound potassium nitride?
Hydrogen's nucleus is electron deficient when it bonds with an electronegative atom.
Why is hydrogen bonding only possible with hydrogen?
Have a numerical charge that is found by subtracting 8 from the group number.
The nonmetals in Groups 6A and 7A ____.
Fe^(3+), O^(2-); Fe2O3
Which of the following shows correctly an ion pair and the ionic compound the two ions form?
nano-, 9 (she put nona)
Which of the following correctly shows a prefix used in naming binary moleular compounds with its corresponding number?
All would have the same volume.
Given 1.00 mole of each of the following gases at STP, which gas would have the greatest volume?
CH4N, 90 g, C3H12N3
Which of the following sets of empirical formula, molar mass, and molecular formula is correct?
Activity series of metals
In order to predict whether or not a single-replacement reaction takes place, you need to consult a chart that shows the ___.
PbO2 -> Pb + O2
Which of the following is a balanced equation representing the decomposition of lead (IV) oxide?
The reactant may be a solid metal.
Which of the following statements is NOT true about double-replacement reactions?
The reactants are generally two ionic compounds in aqueous solution.
In a double-replacement reaction, ___.
A double-eplacement reaction takes place when aqueous Na2CO3 reacts with aqueous Sn(NO3)2. You would expect one of this reaction to be ___.
How many moles of H3PO4 are produced when 71.0 g P4O10 reacts completely to form H3PO4?
P4O10 (s) + 6H2O (l) -> 4H3PO4 (aq)
How many liters of hydrogen gas are needed to react with CS2 to produce 2.50 L of CH4 at STP?
The average kinetic energy of the gas decreases.
As the temperature of the gas in a balloon decreases, which of the following occurs?
The pressure decreases
What happens to the pressure of a gas inside a container if the temperature of the gas decreases?
The volume of the container is increased.
Which of these changes would NOT cause an increase in the pressure of a contained gas?
The ration of the volume and temperature in kelvins.
When the pressure and number of particles of a gas are constant, which of the following is also constant?
number of moles
What does the ideal gas law allow a scientist to calculate that other gas laws do not?
What is the boiling point of a solution that contains 3 moles of KBr in 2000 g of water? (K`b = 0.512°C/m; molar mass of water = 18 g)
The reaction makes more products.
What happens to a reaction at equilibium when more reactant is added ot the system?
The reaction makes more products.
In an endothermic reaction at equilibrium, what is the effect of raising the temperature?
What coefficient of H^+ balances the atoms in the following half-reaction?
H^+ + MnO2 -> Mn^(2+) + H20
Please allow access to your computer’s microphone to use Voice Recording.
Having trouble? Click here for help.
We can’t access your microphone!
Click the icon above to update your browser permissions and try again
Reload the page to try again!Reload
Press Cmd-0 to reset your zoom
Press Ctrl-0 to reset your zoom
It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.
Please upgrade Flash or install Chrome
to use Voice Recording.
For more help, see our troubleshooting page.
Your microphone is muted
For help fixing this issue, see this FAQ.
Star this term
You can study starred terms together