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Consider the following separation of materials state whether a physical process or a chemical reaction is involved in each separation.
a). Sodium chloride is obtained from seawater by evaporation of the water?
b). Mercury is obtained by heating the substance mercury (ll) oxide; oxygen is obtained?
c). Pure water is obtained from ocean water by evaporating the water and then condensing it?
d). Iron is produced from an iron ore that contains the substance iron (lll) oxide?
e). Gold is obtained from river sand by panning allowing the heavy metal to settle in flowing water?
What type of chemical reaction is the following?
a 2.55-g sample of a mixture of fecl2 znd feno32 is treated with excess agno3aq. the recipitate is filtered off dried
a mass of solid aluminum is at its melting point. what is the maximum mass of this sample that can be melted by 120 kj
Calculate ?G for the reaction A+A--> P+ Q at 37 degrees C when the equilibrium concentrations are [A]=1 µM [Q]=2 mM, [P]=4 mM. Is the reaction exergonic or endergonic under standard conditions
Explain why two layers formed when 3 M NaOH was added to the ether solution after the initial separation. What solvents do the two layers represent? Which solvent forms the upper layer? Why?
The density of ethanol is 0.789 g/cm3. What is the density of the object?
Bomb Calorimeter, gross heat of combustion, In the following experiment 1.1651g of benzoic acid (6318 cal/gm) produced a net corrected temperature rise of 3.047C, also 8 cm (2.3 cal/cm) of fuse wire were consumed in the firing.
What are the volumes of gases produced in the reaction of dehydration of 500 microliters of 2-butanol and 250 microliters of conc. sulfuric acid if the molar ration of gases (1-butene:trans-2-butene:cis-2-butene) is 1:3:2
How many grams of O2 will be required to completely react with 2.43 grams of Mg metal ribbon to produce MgO.
Determine the molecular formula for the unknown if the molecular mass is 60.0 amu and the empirical formula is CH2O.
Discuss the chemical interactions of the material(s) involved in this incident or hazardous properties relevant to the incident; Discuss the mitigation required or implemented.
The vessel and contents are returned to 100 degrees C, and the mixture of product gases (CO2, SO2 and unreacted O2) has a total pressure of 2.40 atm. Determine the partial pressure of each of these gases in the final product mixture
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