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The first-order decomposition of S2O6(g) to form SO3(g), has a half-life of 1.262 x 10-3 s at 45oC. How long will it take for 40% of a 0.34 M sample to decompose at 45oC
The mass spectrum of an organic compound shows the relative abundances of M to be 85.12% and M+1 to be 0.9206%. Assuming the peaks are caused by C-12 and C-13 isotopes
A solution consists of 0.450 mole of pentane, C5H12, and 0.250 mole of cyclopentane, C5H10. What is the vapor pressure of pentane in this solution at 25°C?
What is the value of the rate constant for this reaction, what it the half life of the reaction under the conditions of this experiment
Determine the order of the reaction and write a narrative of your approach to determine its order. What is the rate constant for the reaction?
Hydrochloric acid (HCl) reacts with sodium carbonate (Na_2CO_3), forming sodium chloride (NaCl), water (H_2O), and carbon dioxide (CO_2). This equation is balanced as written
calculate the heat of hydrogenation of naphthalene. Does this value provide any evidence for aromatic character in naphthalene?
Why do carboxylic acids (-COOH) compounds have higher boiling points than simple alkanes of the same molecular weight
What mass of this substance must evaporate in order to freeze 160 g of water initially at 19 C? (The heat of fusion of water is 334 {J/g}; the specific heat of water is 4.18 {J/g c. K}.)
Calculate the change in entropy of a system (in Joules) when 20.0 moles of oxygen gas undergo an isothermal reversible expansion from 30.0 L to 80.0 L.
what is the molar solubility of magnesium hydroxide? what is the solubility product, ksp, for magnesium hydroxide? Express the Ksp with the correct number of significant figures.
If more NH4HS is added to a flask in which this equilibrium exists, how is the equilibrium affected? What is some additional NH3 is placed in the flask? What will happen to the pressure of NH3 if some H2S is removed from the flask?
Which substance contains molecules that will not form hydrogen bonds?
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