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The tank is filled with O2 to a pressure of 175 atm at 25°C. How many moles of O2 does the tank hold, and what volume would the gas occupy at 1.00 atm and 25°C?
Consider the equation (-1)(-1)+(-1)=0. How can this equation be true? Can you use the properties of operations to prove your conjecture?
If 11.7 grams of carbon dioxide is produced from the decomposition of 30.7 grams of calcium carbonate, what is the percent yield of the reaction?
Ann earns $7.75 per hour working. She needs at least $425 for a stereo. Write an inequality that describes how many hours she must work to reach her goal.
A diatomic gas at high temperature shows a series of vibrational absorptions. By accident, some of the data are lost but it is known that the absorption frequencies included 5600, 11200, and 14000 w
Use the radius of a sodium atom from the elements handbook to calculate the number of sodium atoms in a row 5.00 cm long. Assume that each sodium atom touches its two neighbors.
Write the total ionic and net ionic equations for the reaction of aqueous silver nitrate with a calcium chloride solution.
What is the mole fraction of each gas in the mixture? If the mixture occupies a volume of 10.5 liters at 65°C, calculate the total number of moles of gas in the mixture.
For each element, first write the electronic configuration of all the electron then give the electronic configuration of the valence electron only: [a] magnesium [b] strontium [c] flourine.
Question: Amount of heat energy required to convert 1 kg of ice at minus 10 degree celius to water at 100 deg cel is 777000 joule. Calculate the specific latent heat.
Question: A cylindrical tank 10 ft high and 5 ft in radius is standing on a platform 50 ft high. Find the depth of water when one-half of the work required to fill the tank from the ground level th
The decomposition of a compound in carbon tetrachloride has a rate constant of 7.49 x 10^-3 M^-1 min^-1. If we start with a concentration of the compound of 0.0525 M, what will The concentration be
Given a set S of k-vertices, is it possible to construct a graph G of p vertices(p>k) containing S such that G contains a Steiner tree T of S. Is the above problem is equivalent to the Steiner tr
When resistence of 2 ohm is connected across the terminals of a cell the current is 0.5 ampere when resistence is increased to 5 ohm the current is 0.25 ampere what is the potential difference of th
Using the trend in the periodic table, rank the following atoms in order of increasing electronegativity:
If you have a five carbon molecule that has an aldehyde group on one end and an OH group on the other and you put it through acid catalyzed hydration, what kind of molecule is this most likely goin
Write the equilibrium constant-expression for this reaction in terms of partial pressures. (b) Why doesn't the concentration of Na2O appear in the equilibrium-constant expression?
Jill and Jamahl are comparing their sprcial numbers. Jill's number has a prime factorization with six prime numbers. Jamahl's number has a prime factorization with only three numbers. Jill says this
Consider the reaction in which ferric oxide is converted to iron and gaseous oxygen. If this reaction is only 90.0% efficient and the ferric oxide is only 82.0% pure, in order to make 4.00 moles Fe
Question: What is the specific gravity of an object that weighs 13.35g and has a volume of 25.0ml? The density of water under the same conditions is 0.980 g/ml.
The half-life for the radioactive decay of C-14 is 5730 years. How long will it take for 20% of the C-14 atoms in a sample of C-14 to decay?
A mathematics teacher collects old books. a student asked him how many books he had. He said if i divide the books into 2 unequal whole numbers, then 64 times the difference between the two numbers
This is placed in contact with a semipermeable membrane and the water level rises by 26.3 cm. What is the molar mass of the protein?
The formula F= 1.2x + 21.6 models income, F in the thousands of dollars, for a family of 4 in minnesota since 2000. How many years after 2000 is the average family income expected to reach $40.8 tho
Rondell makes $10 an hour cutting grass and $12 an hour raking leaves. He cannot work more than 15 hours per week. Graph two inequalities that Rondell can use to determmine how many hours to work at