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Discuss how much heat would be needed to change the temperature of 150g water from the 25C to 75C? Explain what volume of mercury which is having the density 13.6g/cm3 will have 0.0375kg? (go to 2 dec
Explain what state of a) benzene and b) naphthalene may be reached by the electric dipole transitions from their (totally symmetrical) ground state?
Determine the average mass percent of oxygen in potassium chlorate using your two experimental values. Is it lower than either of your individual experiments How well do your experimental results ma
Determine the numbers of mL of 1M CuSO4 is required for 1g Zn to completely react based on the equation : Zn(s) +CuSO4(aq) --> Cu(s) +ZnSO4(aq)
Explain how much calcium would be needed to make 15.0g of calcium oxide if the calcium oxide can be prepared by heating calcium metal in oxygen.
A 2.0-L vessel contains the 4.65g of a gas at 1.00 atm and 27.0 degree C. Determine the density of the gas in grams per liter. Determine the molar mass of the gas?
Determine the concentration of Ca+2 and CO3-2 at equilibrium. Determine the equilibrium constant for the dissolution reaction.
Determine the numbers of electrons will aluminum gain or lose when it forms an ion? Write down a concise paragraph explaining what is meant by the "diagonal effect" and explain how it can be acco
Hydrogen gas,H2(g) and the Carbon dioxide gas, CO2 (g), are brought together in a vessel and heated to1565oC. At this temperature they react to produce the water, H2O(g) and the carbon monoxid
The combustion analysis of toluene, a common organic solvent, forms the 0.00137g of H2O and 0.00586g of CO2. If the compound contains only hydrogen and carbon, determine the molecular formula when the
Explain why is it important to fill the burette with the NaOH solution before performing a acid/base titration, and discuss what effect does that have on the determination of the Ka of the acid?
What is the final temperature when 121 mL water at the 30.°C is mixed with 63 mL water at the 84°C? Assume that no heat is lost to the surroundings and that the density of water is 1.00 g/m
Explain how long would it take in seconds to increase the temperature of the water from 12.0oC to41.5oC when a bowl of 345 g of water is placed in a microwave oven that puts out the 766 watts (J/s).
Assuming no heat is lost to the surroundings, what is the temperature of the water and the metal? 40grams of a certain metal at 98 degrees Celsius was placed into the 80mL of water at 297K.
Determine the molecular weight of an unknown gas if 200 mL of this gas diffuses through an apparatus in 180 seconds while the 250 mL of NO2 under the same conditions diffuses through the same appar
Determine the numbers of grams of water must be added to 200 mL of NaOH solution in order to have a solution with a specific gravity of 1.157, 13.55% when the specific gravity of NaOH = 1.3
Determine the numbers of kilocalories of heat will be formed by 160 grams of methane if every mole of methane produces 192 kilocalories of heat.
Determine the numbers of mL of the HCl will be required? In neutralization reaction, the number of milli equivalents of the acid and the base must be equal at the end point iIf the 20 mL of
Determine the concentration of a solution made by adding the 30 mL of water to 35 mL of a 6.0 M solution, assume that the volumes are additive. Discuss in detail.
Explain what was the molecular weight of the substance in g/mol when the 2.75 g of a substance was dissolved in the water to yield 150 mL of solution and the concentration of that solution was dete
The solubility of an unknown compound X in ethanol is found to be 1.4grams per 10 mL at 78ºC and 0.21 grams per 10 mL at 0ºC. Calculate the minimum amount of ethanol required to re-crystal
What volume of water must you add to make a solution that is 25.00% by weight sucrose if the mass of sucrose you add to the beaker is 12.241 g? Assume the density of water is 1.000 g/mL.
What volume will it swell to in toluene if a cross-linked sample of poly isobutylene swells 10 times its original volume in cyclohexane? Discuss in detail.
The salt is generally soluble in the aqueous layer even if the starting acid was not soluble in the aqueous layer. The solubility of organic molecules can be moderated by the use of acid-base chemis