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Calorimetry/work
molarity / Net ionic
Reaction Stoch
Gas Laws
oxidation/ reduction
100
what mass(in grams) of h20 is produced if 1.5*10^3 kJ of heat is generated for the reaction below? C4H10+13/2O2-->5H20+4CO2 with a heat of reaction of -2658 kJ
What is 51 grams
100
How many moles of Potassium ion are their in a 7 mole solution of Potassium Sulfate at a volume of 5 L that is reduced to a volume of 3L?
What is 8.4 moles
100
What is the disassociation of a strong electrolyte?
it fully disassociates
100
Calculate the volume (in L) of 40.6 g of F2 at STP
What is 23.9 L
100
What is the oxidation state of iron in Na4Fe(OH)6?
What is +2
200
The internal energy of a thermodynamics system is increased by 300 j while 75.0 J of expansion work is done on a piston cylinder. How much heat (q) was transferred and is the system absorbing or releasing heat to the surroundings?
What is +375 J: heat is absorbed by the system from the surrounding
200
What is the net ionic equation of the precipitations of silver chloride from a solution of silver nitrate and potassium chloride?
(Ag+)aq +(Cl-)aq-->AgCl(s)
200
What is the limiting reagent in a combustion reaction between methane and oxygen when you have 5 g of methane and 12 g of oxygen?
What is oxygen
200
A student ignores the warning labels and throws an empty (no liquid left, no spray) can of hair spray into his campfire. a. Assuming an ambient temperature of 25 °C an atmospheric pressure of 7.20 x 102mmHg, and a temperature in the coals of 600 °C (assume two significant figures), find the pressure in the can in the fire, assuming it doesn't burst or expand (it is rigid). b. If the volume of the can is 420 mL, how many moles of gas are in the can?
What is a)2.0x103 mmHg and b)0.11 mol
200
What is the common oxidation number of O, H, and Mg when not in their natural states?
What is -2, 1, 2
300
What formula do you use to determine the delta H of a reaction when you are given the specific heat?
What is mass*specific heat* change in temperature
300
What is the new volume of a 6 M solution that was originally at .5 L that is now at a 7.5 M concentration?
What is a .4 L
300
How many liters of 0.100 M HCl would be required to react completely with 5.00 grams of calcium hydroxide?
What is 0.135 L
300
What law shows that their is a _______ relationship between pressure and volume?
a inverse relationship is shown between pressure and volume is shown in Boyles law
300
In the redox reaction below, what atom(s) are oxidized and which are reduced? Sn+4HNO3-->SnO2+4NO2+2H2O
What is Sn is oxidized and N is reduced
400
Phileas Fogg, the character who went around the world in 80 days, was very fussy about his bathwater temperature. It had to be exactly 38.0o C. You are his butler, and one morning while checking his bath temperature, you notice that it’s 42.0oC. You plan to cool the 100.0 kg of water to the desired temperature by adding an aluminum-duckie originally at freezer temperature (-24.0oC). Of what mass should the Al-duckie be? [Specific heat of Al = 0.900 J/(goC); density of water =1 .00 g/ml]. Assume that no heat is lost to the air.
What is 30.0 kg
400
If I combined 15.0 grams of calcium hydroxide with 75.0 mL of 0.500 M HCl, how many grams of calcium chloride would be formed?
What is 2.08 grams
400
Methanol (CH3OH) can be burned as an alternative to fossil fuels. For the following reaction, determine the amount of CO2 that is formed when 130.0 g of CH3OH reacts with 150.0 g of O2. What is the limiting reagent? For the methanol combustion reaction, suppose only 75.0 g of carbon dioxide is formed. What is percent yield for the reaction?
What is oxygen is the limiting reagent, producing 137.5 g of CO2. the percent yield is 54.5%
400
What does absolute value stand for?
What is the temperature where all the molecules stop moving ?
400
What is the oxidation state of potassium in Na3PO3
What is +3
500
A 1.55 g of CH4O sample is burnt in a calorimeter. If the molar heat of combustion of CH4O is -725 kJ/mole, and assuming that the 2.0 L of water absorbed all of the heat of combustion, what temperature change did the water experience?
What is 4.2 C
500
How many L are in 3.4 M solution of isopropanol that is made out of 78 g of ispropanol (C3H8O)?
What is .41 L
500
Consider the following unbalanced reaction: TiO2 + C → Ti + CO When 28.6 g of C is allowed to react with 88.2 g of TiO2, how many grams of TiO2 can be produced? Which reactant is the limiting reagent? Which reactant is in excess? How much of that reactant is leftover?
What is TiO2 is the limiting reagent and C is in excess. There is an excess 2.06 g of C left after the reaction goes to completion
500
Small quantities of hydrogen gas can be produced in a lab by adding hydrochloric acid to metalic zinc. Suppose 240.0 ml of H2 gas is collected at 30.0 degree celcius and has a total pressure of 1.032 atm by this process. What is the partial pressure of H2 gas and how many grams of zinc must have reacted to produce this quantity of h2 gas. (vapor pressure of water is 32.0 torr at 30.0 degree C)
What is P(H2)=.990 atm and .625 g Zn
500
Balance this reaction, Cr(OH)3 + Br2 -->CrO42- + Br- in basic solution
What is 10 OH- + 2 Cr(OH)3 + 3 Br2 --> 2 CrO42- + 8 H2O + 6 Br-