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Consider the combustion of {rm{H}}_2 (g):2{rm{H}}_2 (g) + {rm{O}}_2 (g) rightarrow 2{rm{H}}_2 {rm{O}}(g). If hydrogen is burning at the rate of 0.61 {rm mol/s}, what is the rate of consumption of oxygen?
Calculate the solubility of zinc hydroxide, Zn(OH)2, in 1.00 M NaOH. Ksp = 3.0 × 10-16 for Zn(OH)2, Kf = 3.0 × 1015 for Zn(OH)42-
To estimate the percentage of all-trans-lycopene present in the original tomato paste, should you average the percentages obtaned by all the members of your team? If not, what should you do, and why?
A certain flexible balloon contains helium gas at 855L. Initially the balloon was at sea level and the temperature was 25 degrees Celsius with 732 torr.
A solution is made by combining 500ml of .10M HF with 300ml of .15M NaF. What is the pH of the solution? (Ka=7.2e-4 for HF)
A Why is it an important concept that atoms generally appear in whole number molar ratios to each other in chemical compounds? What does this tell us about the nature of matter?
What volume of H2O(g) is produced when 7.90 mo of C2H4 (g) reacts at STP? C2H4 (g) + 3O2 (g) ----> 2 CO2 (g) + 2 H20 (g)
If the solubility of a gas is 7.5 g/L at 404 kPa pressure, what is the solubility of the gas when the pressure is 202 kPa?
What is the electron configuration of diatomic BN+. What is its bond order
A physiological saline solution is 0.92% sodium chloride (NaCl) by mass and has a density of 1.005 g/mL. What is the osmotic pressure of such a solution at body temperature of 37 degree C
What is the pH at the half-stoichiometric point (half-way to the endpoint) for the titration of 0.22 M HNO2(aq) with 0.10 M KOH(aq)?
Multiple choice questions in organic chemistry - Which of the following statements are true about the processes of melting and freezing?
2.4g of N2, 2.4g of H2, and 9.6g of CH4. What is the mole fraction of H2 in the mixture?
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