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the property of mercury that allows it to form an amalgam with gold has been used in thee mining industry for hundred of years. during the boom in california in the 19th century, it is estimated tha
Sometimes redox reactions happen differently in acidic or basic solutions. Explain, in your own words, the difference in how you balance a reaction in acidic solution and basic (alkaline) solution.
Vanadium(III) can reduce nitrate ion (NO3-) to nitrite ion (NO2-), producing VOCl3 also Write the BALANCED chemical equation for this reaction.
The solubility of ammonium chloride at 70. C is 60. g of solute per 100. g of water. Which solution would be saturated at 70. C
the property of mercury that allows it to form an amalgam with gold has been used in thee mining industry for hundred of years. during the boom in california in the 19th century
A 32.0 g sample of liquid water at 21.0C absorbs 2276 J of heat energy. What will be the final temperature of the water? The specific heat of liquid water is 4.185 J/gC.
What quantity of heat is required to change 40.0 g of ice at melting point to liquid water? The heat of fusion of ice is 335 J/g. The answer should be 13400 J Please include steps in solving
find the molecular formula for a compound with the empirical formula ch2o. the molar mass of the compound is 180.2 g/mol
The percent composition by mass of a compound is 40.0% carbon, 53% oxygen and the rest is hydrogen. find the empirical formula of the compound
Find the nuclear binding energy of uranium-234 (atomic mass = 234.040947 amu) in utits of joules per nucleon. (Data: neutron mass = 1.674928 x 10^-24 ; proton mass = 1.672623 x 10^-24; Avogadro's Nu
If a contemporary wooden chair were somehow preserved to for the next 3,900 years, what C-14 dacay rate should be expected from the wood used to make the chair? (t1/2 = 5730)
What is the identity of the acid present in carbonated beverages that hastens the hydrolysis of aspartame
What was the concentration, in mol/L and mg/L, of Cu^2+ and Zn^2+ in the original solution? If the solution was prepared by dissolution of 0.654 g of brass in 250.00 mL solution, what the percentage
A fixed amount of gas at 25.0 °C occupies a volume of 9.23 L when the pressure is 629 torr. Use Charles's law to calculate the volume (L) the gas will occupy when the temperature is increased to
What is the pH at the equivalence point when 30.0 mL of 0.20 M HCl are titrated with 0.45 M NaOH at T = 298 K? Kw = 1.00 x 10-14.
What would you expect the differene between reactivity of the following pair? hexane and cyclohexene
What is the pH at the equivalence point when 20.0 mL of 0.20 M CH3NH2 is titrated with 0.40 M HCl? Kb = 4.4 × 10G4 for CH3NH2.
If the density of ocean water at a depth of 10,000 m is 1.071 g/ml and if 29 g of water at that depth contains 184 mg of potassium chloride, what is the molarity of potassium chloride in the sample
Assuming that the gas becomes saturated with benzene vapor and that the total gas volume and temperature remain constant, what is the vapor pressure of the benzene in torr
Given that the 50.0 mL of 0.12 M weak acid is titrated with 0.20 M NaOH and Ka = 1.8x10-5, calculate the predicted volume of base (Vb) needed to be added to achieve a pH of 7.00.
What is the solubility of Pb3(PO4)2 in a 0.025 M Na3PO4 solution? The solubility product for Pb3(PO4)2 is 1.0 x 10^-54.
a mixture of 0.140 moles of C is reacted with 0.117 moles O2 in a sealed, 10.0 L vessel at 500 K, producing a mixture of CO and CO2. the total pressure is 0.640 atm. What is the partial pressure of
The balloon is designed to continue its ascent to an altitude of 30 km, where it bursts, releasing a package of meteorological instruments that parachute back to Earth.
If 0.7438 g of potassium hydrogen phthalate is used and the equivalence point occurs at 33.00 mL of NaOH, calculate the molarity of the NaOH solution to the correct number of significant figures.
A sample of a gas weighs 2.880 g and has a volume of 1010.0 ml at 685.0 torr and 29.0 C. What is its molar mass