Chem 1001 tests 2 & 3
The Lewis Structure of carbon tetrafluoride has ______ nonbonding electron pairs on carbon.
0
What is the concentration in % (m/m) of a solution prepared by mixing 15.0 g of KCl with 109.0 g of distilled water? Express your answer to three significant figures and include the appropriate units.
12.1%m/m
Calculate the %m/v of a solution containing 44 g of sucrose in 300 mL of a carbonated drink. Express your answer to two significant figures and include appropriate units.
15%m/v
A child's balloon containing 9.0 L of helium gas at sea level is released and floats away into the atmosphere.What will the volume of the helium (in L) be when the balloon rises to the point where the atmospheric pressure is 380 mmHg? Assume that the temperature and amount of the helium remain unchanged. Express your answer to two significant figures and include the appropriate units.
18 L
A 142.0-mL bubble of hot gases at 235 ºC and 1.95 atm escapes from an active volcano. What is the new volume (in mL) of the bubble outside the volcano where the temperature is -23 ºC and the pressure is 0.73 atm? Express your answer to two significant figures and include the appropriate units.
190 mL
How many carbon atoms are in an ethane molecule?
2
How many chiral carbon atoms are there in this molecule?
2
How many atoms of aluminum are present in 1.00 g of aluminum? Note: 1 mol of atoms = 6.02 x 1023 atoms
2.23 x 10^22 atoms
What is the molarity of 770 mL of solution containing 2.10 moles of Na2SO4? Express your answer to three significant figures and include appropriate units.
2.73M
How many equivalents of Mg2+ are present in a solution that contains 3.00 moles of Mg2+?
6
A gas has a volume of 10 L at 0ºC. What is the final temperature of the gas (in ºC) if its volume increases to 37 L? Assume that amount of the gas and its pressure remain unchanged. Express your answer using two significant figures and include the appropriate units.
740 C
What is the molar mass of NaHCO3? Express your answer to two decimal places and appropriate units. Use the following molar masses: Na = 22.99 g/mol H = 1.01 g/mol C = 12.01 g/mol O = 16.00 g/mol
84.01 g/mol
A patient order requires 1.9 L of a 0.6 % benzalkonium chloride antiseptic. You have a 13 % stock (concentrated) solution. How much stock solution (in mL) will you need to prepare the order? Express your answer to two significant figures and include the appropriate units.
88mL
Which of the following processes is nonspontaneous?
A battery being recharged
The following molecules all have the same shape. Which molecule is nonpolar?
C2H4
Which of the following is expected to have the lowest melting point?
C2H6
Which of the following molecules is polar?
CH3OH
Alkanes are made up entirely of which two elements?
Carbon and hydrogen
Which of the following is the most electronegative atom?
Cl
The following are ionic compounds EXCEPT
ClF3
Which of the following statements about vapor pressure is true?
Compounds with higher boiling points have lower vapor pressures at a given temperature
Specify the IUPAC name for N2O5, a covalent compound. Wrong spelling, wrong.
Dinitrogen Pentoxide
The amount of energy in molecules available to do work is called the ________ energy
Gibbs
Write the formula of an acid formed from the anion, sulfite, SO32-.
H2SO3
Which of the following is NOT a strong acid?
HF
Write the formula of an acid formed from the anion, iodide or I-.
HI
What happens to Fe3+ in the following reaction? Fe3+(aq) + Al(s) → Al3+(aq) + Fe(s)
It gained three electrons
Which of the following has the strongest London dispersion forces (LDF) present?
Kr
Which attractive force results from a temporarily induced dipole over a molecule's surface?
London dispersion forces
The hydrides of group 5A are NH3, PH3, and AsH3. Which of the following is the correct arrangement in order of decreasing (highest to lowest) boiling point?
NH3, AsH3, PH3
Which of the following molecules is expected to exhibit the strongest interparticle force of attraction?
Na2O
Which of these reactions is a double displacement reaction?
NaCl(aq) + K2CO3(aq) → Na2CO3(aq) + KCl (aq)
Which of the following is a strong base?
NaOH
The following are D-isomers except:
OH on left side at bottom
Which of the following is the correct formula for tetraphosphorus trisulfide?
P4S3
Determine which of the statements is incorrect regarding this figure:
Reaction II occurs faster than reaction I.
Which of the following statements about the relative boiling points of alkanes is true?
The larger the surface area in an alkane, the higher the boiling point.
In the pyranose ring form of glucose, which oxygen is included in the 6-membered ring?
The oxygen on C-5
Tylenol Children's Elixir containing 160 mg acetaminophen per 5 g of water. Identify the solute.
acetaminophen
The minimum amount of energy required to form products when the reactants collide is known as ____
activation energy
Which of the following factors influence the rate of a reaction?
all of the above
The formation of a glycosidic bond is an example of which class of organic reaction?
condensation
If the pressure above a solution decreases, the solubility of a gaseous solute will
decrease
The strongest attractive force that occurs between compounds is _____.
ionic attraction
A carbohydrate with a ketone functional group is called:
ketose
The rule that elements will react in such as way as to become stable by obtaining a filled valence shell is known as the
octet rule
Hypochlorous acid is a weak electrolyte. Which of the following best describes its behavior in water?
partially dissociate
Name the acid formed from perchlorate.
perchloric acid
Which of the following structures is cyclobutane?
square
What substance is indicated by the name under the arrow in this equation?
the enzyme that catalyzes the reaction
Image result for pbr3 lewis structure
trigonal pyrimidal
