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The mineral greenockite is a rare yellow sulfide of cadmium that is 78.0% cadmium and 22.0% sulfur by mass. Determine the empirical formula of greenockite.
What is the spin notation for Plutonium?
What is the partial pressure of hydrogen gas in a mixture of hydrogen and helium if the total pressure is 588 mm Hg and the partial pressure of helium is 445 mm Hg?
How many atoms are there in this element. 45.36 g of Na? Enter your answer as #.##e## (for example: 6.02e23) molecules.
According to the following reaction, how many grams of ammonia will be formed upon the complete reaction of 30.1 grams of ammonium chloride?
Why is the lattice energy of potassium bromide more exothermic than the lattice energy of rubidium bromide?
When 24.0 g of glucose (a nonelectrolyte) are dissolved in 500. g of water, the solution has a freezing point of -0.47°C. What is the molar mass of glucose? Kf of water is 1.86°C/m.
What is the main purpose of scratching beaker's wall during the synthesis of the complex?
What is the volume of the Hope Diamond, the world's largest blue diamond at 44.4 carats? (1 carat = 200 mg). How many carbon atoms does it contain?
There are side reactions. These plus losses of product during its purification reduce the overall yield. A typical yield of purified adipic acid is 68.6%.
What is the chemical formula for potassium tetrabromo(ortho-phenanthroline)-cobaltate(III)
Calculate the mass ( kg ) of the solute C4H8O and the volume ( mL ) of the solvent C6H6 that should be combined to generate 6450 g of a solution that is 2.07 m C4H8O.
A solution containing 16.9 g of nonvolatile molecular compound in 250. g of water has a freezing point of -0.744°C. What is the molar mass of the substance?
Calculate the theoretical yield of AlF3, obtained from 0.35 mole of Al in the reaction:
Cobalt-60, which undergoes beta decay, has a half life of 5.26 years. How many beta particles are emitted in 160 s by a 3.95 mg sample of 60Co?
Magnesium metal reacts quantitatively with oxygen to give magnesium oxide, MgO. If 5.00 g of Mg and 5.00 g of O2 are allowed to react, what weight of MgO is formed, and what weight of which reactan
Dimethylhydrazine, (CH3)2NNH2, was used as a fuel for the Apollo Lunar Descent Module, with N2O4 being used as the oxidant. The products of the reaction are H2O, N2, and CO2. i) Write a balanced che
At 25ºC the solubility product constant, Ksp, for strontium sulfate, SrSO4, is 7.6´10-7. What is the molar solubility of SrSO4 in pure water at 25ºC?
Aluminum dissolves in an aqueous solution of NaOH according to the following reaction: Which is the limiting reagent?
Explain the difference (or similarity) in conductivity of: K2C2O4 and CaCl2. Do the same thing for H2C2O4 and HCl
Polar molecules are responsible for the absorption of mircowave energy by food items. Draw the Louis structure for each of the following substances, state which ones will absorb microwaves and why.
By titration, 23.4 mL of aqueous H2SO4 neutralized 24.8 mL of 0.0495 M LiOH solution. What was the molarity of the aqueous acid solution?
A 460 mL sample of oxygen (O2) was collected by displacement of water at 24 ? C under a total barometric pressure of 1095 torr. What mass of dry oxygen was collected? The vapor pressure of water at
If the yield of potassium benzoate cannot realistically be expected to be more than 68%, what is the minimum number of grams of toluene needed to achieve this yield while producing 10.0 g of KC7H5O2
Potassium carbonate was added to the water to prevent freezing during cold weather. If the solution is 40.0% K2CO3 by mass, what is the "ideal" freezing point of this solution in Celsius?