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Calculate the average atomic mass of iron:
Isotope: 54Fe; 56Fe; 57Fe; 58Fe
Mass (amu): 53.940; 55.935; 56.935; 57.933
Abundance: 5.82 %; 91.66 %; 2.19 %; 0.33 %
If a solution containing 92.455 g of mercury(II) chlorate is allowed to react completely with a solution containing 16.642 g of sodium sulfide, how many grams of solid precipitate will be formed?
Calculate [Cr^3+] in eequilibrium with Cr(OH)4- when 0.010 mol of Cr(NO3)3 is dissolved in a liter of solution buffered at pH 10.0
Can glucosamine be drawn as a linear molecule or does it only exist as a ring structure
A 1.70-g sample of a large biomolecule was dissolved in 11.0 g of carbon tetrachloride. The boiling point of this solution was determined to be 77.85°C. Calculate the molar mass of the biomolecule.
2NO(g) + O2(g) 2NO2(g) Given that we start with 0.035M NO(g) and 0.035M O2(g) AND end with 0.012M NO2.
Write a balanced equation for the following reaction: nitric acid reacts with calcium hydroxide to produce water and calcium nitrate
Question- The following balanced equation is incorrect. Explain why this is and give the correct balanced equation; Al(s)+3Cl(g) ---> AlCl3(s)
The volume of 1 drop of medicine is 1.86 mL. What is the volume in deciliters of 1000 drops of medicine? Write answer as a decimal.
At what temperature would a 1.20 M NaCl solution freeze, given that the van't Hoff factor for NaCl is 1.9? K_f for water is 1.86 C/m
State whether sulfuric acid is a strong or weak acid and write a fully balanced chemical equation for the dissociation of sulfuric acid in aqueous solution. Hence calculate the pH of a 2.2 x 1-^-3 mol dm^-3 aqueous solution of sulfuric acid.
What does your percent error indicate about the experiment? What are possible sources of error in this experiment?
the molar heats of combustion of three hydrocarbon gases arech4 methane- 890.0 kjmolc2h6 ethane- 1560.0 kjmolc3h8
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