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Stoichiometry
Stoichiometry II / Ideal Gas Law
Solutions
Organic Chemistry
Thermochemistry
100
Which is greater, 5.62g of krypton or .1 moles of krypton?
.1 mol Kr
100
A kilogram of iron contains how many moles of iron?
18 mol
100
What is the percent by volume of ethanol that contains 35mL of solute dissolved in 115mL of water?
23.3%
100
What kind of molecule is this? http://schools-wikipedia.org/images/196/19641.png
Carboxylic acid
100
What is the energy required (in kJ) to increase the temperature of 200 g of water from 10°C to 90°C?
66.94 kJ
200
What is the percentage of oxygen in carbon dioxide? (CO2)
72.7%
200
What is the percentage of nitrogen in caffeine?
28.9%
200
What is the percent by volume of isopropyl alcohol in a solution that contains 24mL isopropyl alcohol in 1.1L water?
2.13%
200
What kind of molecule is this? http://chemwiki.ucdavis.edu/@api/deki/files/6086/=image203.png?revision=1&size=bestfit&width=162&height=110
Amide.
200
What is the energy required (in kJ) to increase the temperature of 350 g of water from 25°C to 50°C?
36.61 kJ
300
If you have two moles of potassium phosphate, what is the mass of potassium nitrate that is produced? K3PO4 + Al(NO3)3 --> 3KNO3 + AlPO4
606 g.
300
Cu + 2AgNO3 --> Cu(NO3)2 + 2Ag Using 1 mol of copper, what is the percent yield of the silver, if 60.0g was collected?
27.77%
300
What is the molarity of a solution with 40g of glucose in 1.5L of solution?
.148M
300
Name the following molecule: http://www.sciencegeek.net/APchemistry/APtaters/graphics/alkanes/alkane24.gif
5,7-diethyl-4,4,7-trimethyl-5,6-dipropyldecane
300
How much energy (in kJ) would you need to increase the temperature of the whole Atlantic Ocean by 1°C?
1.298E24 kJ
400
Given the following: 42.07% Na, 18.89% P, and 39.04% O, determine the empirical formula.
Na3PO4
400
Potassium chlorate decomposes into potassium chloride and oxygen gas. If 20.8g of potassium chlorate decomposes, how many liters of oxygen gas will form at STP?
5.70 L
400
What is the molarity of a solution with 1.5g of potassium bromide in 1.60L of solution?
.00787M
400
Name the following molecule: http://www.everythingmaths.co.za/science/grade-12/04-organic-molecules/pspictures/9979df55ef8dc00b3a75f688b2096f12.png What is the hybridization of the second carbon atom?
2-ethylbut-1-ene, sp2
400
How long would it take to increase the temperature of the Atlantic Ocean by 1°C using a typical stove (2000 W)?
1.298E24 kJ, 2.059E16 years.
500
If 40g of ammonia reacts with 80.0g copper(II) oxide, producing elemental copper, nitrogen gas and water, determine the limiting reactant.
Copper(II) oxide
500
If 40g of ammonia reacts with 80.0g copper(II) oxide, producing elemental copper, nitrogen gas and water, how much of the excess reactant remains after the reaction?
28.3 g
500
If you have 30g of naphthalene in 500g of toluene, what is the molality?
.468m
500
Name the following molecule: http://www.everythingmaths.co.za/science/grade-12/04-organic-molecules/pspictures/96f852cdfcbe46a333dc9ff12115a575.png How many pi bonds do you see?
2,2-dimethylhex-3-yne, 2 pi bonds
500
What is the energy required (in kJ) to completely vaporize 1 kg of ice at 0°C? If a typical stove has a power of 2000 W, how long would it take to vaporize the ice?
3008.95 kJ, 1504 s = 25 min