Complete and balance the following equations: (a) NaOCH3(8) + H2O(I) (b) CuO(s) + HNO;(aq) (c) WO;(s) + H2(8) (d) NH,OH(I) + O,(8) (e) Al,C3(s) + H,0(1)
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- Iodine can be prepared by allowing an aqueous solution of hydrogen iodide to react with manganese dioxide, MnO2. The reaction is 2I(aq)+4H+(aq)+MnO2(s)Mn2+(aq)+2H2O+I2(s) If an excess of hydrogen iodide is added to 0.200 g of MnO2, how many grams of iodine are obtained, assuming 100% yield?What is the mass of fish, in kilograms, that one would have to consume to obtain a fatal dose of mercury, if the fish contains 30 parts per million of mercury by weight? (Assume that all the mercury from the fish ends up as mercury (II) chloride in the body and that a fatal dose is 0.20 g of HgCl2.) How many pounds of fish is this?Write balanced chemical equations for the following reactions: (a) zinc metal heated in a stream of oxygen gas (b) zinc carbonate heated until loss of mass stops (c) zinc carbonate added to a solution 0f acetic acid, CH3CO2H (d) zinc added to a solution of hydro-bromic acid
- What is the mass of fish, in kilograms, that one would have to consume to obtain a fatal dose of mercury, if the fish contains 30 parts per million of mercury by weight? (Assume that all the mercury from the fish ends up asmercury(II) chloride in the body and that a fatal dose is 0.20 g of HgCl2.) How many pounds of fish is this?The oxidation state of C in CO32- is ...Consider Palmitic acid C16H32O2, a common fatty acid used in the manufacture of soap. A solution of palmitic acid is prepared by mixing 112 g palmitic acid with 725 mL of benzene C6H6. The density of the resulting solution is 0.902 g/mL. Palmitic acid (molar mass = 256 g/mol and density = 0.852 g/mL); Benzene (molar mass = 78 g/mol and density = 0.879 g/mL) A. What is the %m/m of the solution? B. What is the molarity of the solution? C. What is the mole fraction of the solvent?
- The calcium from a sample of limestone weighing 699mg was precipitated as CaC2O4 and ignited to CaO weighing 138.1mg. What is the percentage of CaCO3 in the sample?Methylhydrazine, N2H3CH3(l), is used with the oxidizer dinitrogentetroxide, N2O4(l), to power the steering rockets of theSpace Shuttle orbiter. The reaction of these two substancesproduces N2, CO2, and H2O. Write a balanced equation forthis reaction.Write a balanced chemical equation for the photosynthesis reaction in which gaseous carbon dioxide and liquid water react in the presence of chlorophyll to produce aqueous glucose (C6H12O6) and oxygen gas.
- In the 1980s, there was an international agreement to de-stroy all stockpiles of mustard gas, ClCH₂CH₂SCH₂CH₂Cl.When this substance contacts the moisture in eyes, nasal pas-sages, and skin, the -OH groups of water replace the Cl atoms and create high local concentrations of hydrochloric acid, which cause severe blistering and tissue destruction. Write a balanced equation for this reaction, and calculate ΔH°ᵣₓₙ.What mass of hydrogen peroxide (H202) must decompose to produce (oxygen and) 0.77 g of water?What is the mass percentage of S in hydrochlorothiazide, C₇H₈ClN₃O₄S₂? Provide an answer to two decimal places.