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How can you decide whether an observed property of matter is a physical or chemical property?
dissolved in enough water to produce 162.5 mL of solution and that 18.8 mL of this solution is titrated to the stoichiometric point with 14.6 mL of 0.0307 M HCl(aq). What is the percentage purity of the original sample?
Hardness in groundwater is due to the presence of metal ions, primarily Mg2 and Ca2 . Hardness is generally reported as ppm CaCO3 or mmol/L Ca2 . To measure water hardness
acetylene gas c2h2 is produced by adding water to calcium carbide cac2.cac2s 2 h2ol rarr c2h2g 2 caoh2aqdetermine how
The fluoridation of city water supplies has been practiced in the US for several decades. It is done by continuously adding sodium fluoride to water as it comes from a reservoir.
What is the % yield of the combustion of methane if we recover 5.0 g of water from the reaction of 10.0 g of methane with 10.0 g of oxygen
A flask contains a mixture of hydrogen and oxygen. The pressure exerted by these gases is 785 mmHg. If the partial pressure of the hydrogen in the mixture is 395 mmHg, what is the partial pressure of the oxygen?
Use the concentrations given below for the concentrated chemcal molarities and write out your calculations to obtain the volume of each stock solution needed to obtain 30.00 L of a 6.00 M
An amount of 0.500 grams of NH4Cl was added to 50.0 mL of the solution in Problem 1 above. Use the Keq calculated from problem 1 to calculate the pH of this solution.
Calculate the number of moles of an ideal gas if it has a pressure of 1.21 atm, a volume of 1.68 L, and a temperature of 217 oC. Use R = 0.0821 L-atm/mol-K for the value of the gas constant
If equal masses of both metals were transferred to equal volumes of water in seperated graduated cylinders, which graduated cylinder would have the greatest volume change. why.
What would be the mass of teh magnesium hydrooxide produced per reaction in the above equation if the % yeild was 88.5%
describe the nature and characteristics of pcbs. why are they of importance to an ehamps or fs professional who
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