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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
The perimeter of a rectangle is 54. the length of the rectangle is three more than three times the width. Find the dimensions of the rectangle.
The vapor pressure of pure ethyl bromide at this temperature is 400.0 torr. Use Raoult's law to determine the molar mass of the compound.
A track is to be constructed around the football field at a junior high school. if the straightaways are 100 yd. in length, what length of radius is needed for each of the semicircles if the total l
Question: The perimeter of a triangle is 76cm. Side a of triangle is twice as long as side b. side c is 1cm longer than side a. find the length of each side.
Rate constants for the reaction NO2(g) + CO(g) -----> NO(g) + CO2(g) are 1.31 M-1s-1 at 700. K and23.0 M-1s-1 at 800. K.
X with seven electron dots around it, Y with six electron dots, and Z with five electron dots. To which groups in the periodic table would each element belong?
Question: Explain placeIf the non-base angle of angle of an isosceles triangle has a measure of 70o, what is the measure of each base angle? How many diagonals does a decagon have?
Briefly differentiate between solvent extraction and chromatography. What roles do these two techniques play in analytical chemistry?
What are the different chemical and physical properities on the basis of what you would view in a series of chemical reactions with the copper reactions?