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It takes 48.0 J to raise the temperature of an 10.7 g piece of unknown metal from 13.0 degree Celsius to 25.0 degree Celsius. What is the specific heat for the metal?
The fact that the number of each type of atom on each side is equal is related to the Law of Conservation of Mass. Balance this equation using the smallest possible integers, S + HNO3 H2SO4 + NO2 + H2
At constant temperature and pressure, what is the maximum volume, in liters, of Fe2O3(s) that can be made from 11.87 L of FeS(s) and 11.74 L of O2(g)?
1 mol of Ar initially at 298 K undergoes an adiabatic expansion against a pressure P external = 0 from a volume of 20.0 L to a volume of 65.0 L. Calculate the final temperature using the ideal gas
If all four gases had initial concentrations of 0.650 M, calculate the equilibrium concentrations of the gases.
State the Arrhenius, Bronsted-Lowry, and Lewis definitions of acids and bases. Given an acid-base reaction equation, pick out the acid, base, conjugate acid, and conjugate base. Know the definition of
In an experiment 1.65g of lead(ii) nitrate react with .327g of zinc. What is the mole relationship between the lead nitrate and the zinc.
Which is the product of the following series of reactions? Which ester is likely to undergo a Claisen condensation to give this product?
What is the number of bond pairs and shapes of C2H4, C2H6, and COS?
Particular coal contains 5.45% by weight of sulfur. How many grams of SO2 gas will be produced when 100.0g of the coal is combusted?
What is the structure of the polysaccharide? Draw a repeating structure of the polysaccharide, showing glycosidic linkages and branches.
how many grams of water are needed to react with 485g of calcium carbide?
What quantity of heat would be evolved if 75.00g of mercury (Hg=200.59), (O=16.00) was burned in oxygen?
A solution of ethanol (C2H5OH) in water is prepared by dissolving 76.5 mL of ethanol (density = 0.79 g/cm3) in enough water to make 250.0 mL of solution. What is the molarity of the ethanol in this
What is the enthalpy change of C2H4(g) + Br2(g)-> CH2BrCH2Br(g)?
A gas sample in a piston assembly expands, doing 588 kJ of work on its surroundings at the same time that 372 kJ heat is added to the gas. What is the change in internal energy of the gas during th
An antacid tablet containing magnesium hydroxide as an active ingredient requires 22.6 mL of 0.597 M HCl for complete neutralization. What mass of Mg(OH)2 did the tablet contain?
What is the final concentration of NaOH when 50.0 mL of .200 M NaOH is added to 50.0 mL of 0.500 M NaOH?
Calculate porphyrin molecule lowest energy absorption if length of molecule is 1000 pm as approximated by porphyrin molecule being planar and the pi electrons being confined inside a square
An unknown solid mixture containing benzoic acid,copper(II)sulfate and sand. She added 15mL.of acetone to her sample. Which component of the mixture dissolved in the acetone?
Which compound reacts with 3 mols of HIO4 to yield 2 mols of HCO2H and 2 mols of HCHO? 20. Which of the following would yield D-glucose and D-mannose when subjected to a Kiliani-Fischer synthesis?&nbs
Assume complete dissociation of the compound. What will be the boiling point of a solution of 4 moles of potassium phosphate (K3PO4) dissolved in 4 kg? Use the following values:
How many grams of sodium lactate must be added to a 1.00L solution of .400M lactic acid to make a buffer with a pH of 3.7 ?
The atomic weight of a newly discovered element is 98.225 amu. It has two naturally occuring isotopes. One isotope has a mass of 96.780 amu. The second isotope has a percent abundance of 41.7%. Wha
Describe (that means you have to write in detail) how to prepare an aqueous 5.0 F solution of acetic acid, CH3COOH. You can start with crystals of the acid and deionised distilled water. Please des