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A sample of the active ingredient in a nutritional mineral supplement was found to contain 0.0392 moles of iron, 0.0393 moles of sulfur, and 0.157 moles of oxygen atoms. What is the empirical formula of the ingredient?
What volume of 0.150M HClO4 solution is needed to neutralize 45.00mL of 8.80×10^-2 M NaOH?
The solubility products of PbSO4 and SrSO4 are 6.3 * 10^-7 and 3.2 * 10^-7, respectively. What are the values of [ SO4 2-], [Pb 2+], and [Sr 2+] in a solution at equilibrium with both substances
Many laboratory gases are sold in steel cylinders with a volume of 43.8L. What mass in grams of argon is inside a cylinder whose pressure is 17,180 kPa at 200C
Consider the standard cell at 25C based on the following half-reactions. Pb^2+ + 2e^- --> Pb E=-0.13V Zn^2+ + 2e^- --> Zn E=-0.76V To the standard cell, OH-, is added to the zinc compartment causing precipitation of Zn(OH)2. After precipitation is..
How many kilograms of CO2 are produced by the complete combustion of 1.00kg of this natural gas
What is the maximum number of electrons in an atom whose highest-energy electrons have the principal quantum number n=5
A bacterial culture isolated from sewage produced 35.0 mL of methane, CH4, at 31°C and 753 mmHg. What is the volume of this methane at standard temperature and pressure (0°C, 760 mmHg)?
When 10cm3 of a gaseous hydrocarbon CaHb was exploded with an excess of oxygen, a contraction of 35cm3 occured (all volumes are measured at rtp). On treatment of the product with NaOH solution, a contraction of 40cm3 occured. Deduce the formula of..
For each of the following states described in the following list, calculate the final pressure, as well as q, w, ?U, and H. a) the gas is expanded isothermally and reversibly until the volume doubles
The aqueous solubility of CO2 at 20 degrees Celsius and 1.00 atm is equivalent to 87.8 mL of CO2(g), measured at STP, per 100 mL of water. What is the Molarity of CO2, in water, that is at 20 degrees Celsius and saturated with air at 1.00 atm. The..
How many grams of isopropyl alcohol, C3H7OH, should be added to 1.0 L of water to give a solution that will not freeze above -16°C
Calculate the volume of 0.460 M radium hydroxide solution required to completely neutralize 10.00 mL of 1.17 M phosphoric acid
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