Math
Naming
Structure
Thermodynamics(and more)
Random
100
Write the balanced reaction for the combustion of H2 gas.
2H2 + O2 ---> 2H2O
100
Give the name for NaOH
Sodium Hydroxide
100
Which element has the following electron configuration: 1s2 2s2 2p6 3s2 3p6 4s0 3d10
Ni
100
It takes 78.2 J to raise the temperature of 45.6g of lead by 13.3 °C. Calculate the specific heat capacity of lead.
0.129 J/g •°C
100
Rank the following elements in order of increasing atomic size (according to the trend): P, Al, Cl, Si, Na
Cl < P < Si < Al < Na
200
LIMITING REACTANT PROBLEM
What mass of CO2 gas is produced when 8.0 g NaHCO3 reacts with 4.0 g HCl?
NaHCO3 (s) + HCl (aq) --> NaCl (aq) + H2O (g) + CO2 (g)
*Use correct number of sig figs
4.2 g CO2 made
200
Write the formula for potassium chloride
KCl
200
The molecular geometry of SO2
Bent
200
S8 (s) + 8 O2 (g)-->8 SO2 (g); ∆H = –2368 kJ
How much heat is evolved when 25.0 moles of sulfur is burned in excess oxygen?
–59,000 kJ
200
Give an example of a closed, open, and isolated system
--
300
What is the percent yield for the reaction of 17.42 g of ammonium carbonate with barium chlorate if experimentally 32.7 grams of barium carbonate was obtained? (mm (NH4)2CO3=96g/mol, mm BaCO3=197.34g/mol)
(NH4)2CO3 (aq) + Ba(ClO3)2 (aq) --> BaCO3 (s) + 2 NH4ClO3 (aq)
91%
300
The formula for copper(II) sulfide
CuS
300
What element is isoelectronic (i.e. same # of electrons) with Al+3 ion?
Neon
300
Determine the empirical formula for a compound that is 76.6% C, 6.4% H, and 17.0% O by mass
HINT: you may need to find the molar mass of each element
C6H6O
300
Determine whether the value of w or q is positive or negative in the following scenario:
A person kicks a soccer ball across the field where the soccer ball is defined as the system
w = +
400
What is the number of atoms of oxygen in 3.20 moles of sodium bicarbonate.
*Use correct number of sig figs
5.78 x 10^24 atoms O
400
Name the following compound: Ca(NO2)2
calcium nitrite
400
The molecular geometry of the chlorate ion.
trigonal pyramidal
400
Find the ΔH for the reaction below, given the following reactions and subsequent ΔH values:
PCl5(g) → PCl3(g) + Cl2(g)
P4(s) + 6Cl2(g) → 4PCl3(g) ΔH = -2439 kJ
4PCl5(g) → P4(s) + 10Cl 2(g) ΔH = 3438 kJ
249.8 kJ
400
Based on the solubility chart down below, state whether the compounds are soluble or insoluble:
AgNO3
CaSO4
LiOH
s
i
s
500
The number of moles of CO2 formed when 1.20 mole of CH4 burns.
*Use correct number of sig figs
1.20 moles CO2
500
Give the name for the following compound: HNO2
Nitrous Acid
500
The orbital hybridization of carbon in CO2
sp
500
State whether the statement is True of False:
Strong acids are strong electrolytes
HF is a strong acid
Weak electrolytes don’t conduct electricity
Ammonia is a weak base
Strong bases contain a hydroxide ion, dissociate 100%, and are strong electrolytes
Nonelectrolytes conduct only a little energy
Ionic compounds and strong acids are strong electrolytes
T
F
F
T
T
F
T
500
The color orange within the visible light spectrum has a wavelength of about 620 nm. What is the frequency of orange light?
4.8×10^14 Hz