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a) If 65.65 g of mercury(II) nitrate and 4.26 g of hydrogen sulfide are mixed in 490.0 g of water to form 54.16g of precipitate, what is the mass of solution after reaction?
b) A piece of gold jewelry weighs 9.35g. Its volume is 0.654 cm3. Assume that the metal is an alloy of gold and silver, which have densities of 19.3 g/mL and 10.5 g/mL respectively. Also assume that there is no change in volume when the pure metals are mixed. Calculate the percentage of gold (by mass) in the alloy. The relative amount of gold in an alloy is measured in karats. Pure gold is 24 karats; an alloy of 50% gold is 12 karats. State the proportion of gold in the jewelry in karats.
The molar volume of the liquid at this temperature and pressure is 163.3 cm^3/mol. At 100 atm the melting temperature changes to 351.26K. Calculate the enthalpy and entropy of fusion of the solid.
Which of the following is likely to form an ion with the most negative charge? A) aluminum B) sulfur C) chlorine D) argon
calculate the energy (in kJ) of a photon which has a wavelength of a mircowave with a wavelength of 2.84 cm
suppose 45.0 g of water at 85 degree celcius is added to 105.0 g of ice at 0 degree celcius. The molar heat of fusion of water is 6.01 kJ mol-1, and the specific heat of water is 4.18 J/g degree celcius.
A student following the procedure of the experiment determining the molar mass of a volatile liquid by the dumas method obtaint the following data for an unknown volatile liquid
calculating theoretical yield for this experiment. It is a dehydration synthesis where one mol of hydrated salt yields 3 mol hydrates and 1 mol of anhydrous salt.
The acid dissociation constant for hypochlorous acid (HClO) is 3.0x10-8. Calculate the concentrations of H3O+, ClO- and HClO at equilibrium if the initial concentration of the acid is 0.05 M. What is the pH? I made an ice table and found x to be 3..
2) Calculate the concentration of an aqeuous solution of Ca(OH)2 pH of 12.05.
In a certain experiment, 2.00 g of NH3 reacts with 2.50 g of O2. a) How many grams of NO and of H2O form? b) how many grams of excess reactants remain after the limiting reactant is completely consumed
Draw the following compound. Be sure to specify the stereochemistry via wedge-and-dash bonds.
The carbon-14 in a living organism is constant until the organism dies, after which carbon-14 decays with first-order kinetics and a half-life of 5730 years. Suppose a bone from an ancient human contains 16.5% of the found in living organisms.
XeF6+3H2O-->___+6HF What is the missing gas oxide? I tired to input XeO3 but that was incorrect.
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