Find identity and the atomic mass of the other isotope
Gallium has an average atomic mass of 69.7 amu. In a typical sample, 60.4% of Ga exists as Ga-69 (68.9257 amu). What is the identity and the atomic mass of the other isotope?
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You need to make 1.00 kg of a 22.5% ammonium chloride solution. How many grams of ammonium chloride do you use? What volume of water will be used?
Calculate the pH of 0.050 M Fe(NO3)3 solution. The hydrated Fe3+ ion is [Fe(OH2)6]3+. For [Fe(OH2)6]3+, Ka = 4.0 × 10-3
A 20.0-mL sample of this glucose solution was diluted to 0.500 L . How many grams of glucose are in 100. of the final solution
Why are primary and secondary alcohols relatively easy to oxidize, but tertiary alcohols resist oxidation
Calculate the mass of ethylene glycol (C2H6O2) that must be added to 1.00 kg of ethanol (C2H5OH) to reduce its vapor pressure by 12.0 torr at 35*C. The vapor pressure of pure ethanol at 35*C is 1.00x10^2 torr.
Toluene, C6H5CH3, is a liquid used in the manufacture of TNT. Its normal boiling point is 111.0oC and its molar heat of vaporization is 35.9 kJ/mol. What would be the vapor pressure (in torr) of toluene at 75.00oC?
The following reaction is known to have a standard change in enthalpy of 148 kJ/mol and a standard change in entropy of 312 J/(mol•K) at 25ºC. What is the normal boiling temperature (ºC) of XY3? XY3(l) ? XY3(g)
Use standard enthalpies of formation to determine Horxn for: 3NO2(g) + H2O(l) ? 2HNO3(aq) + NO(g) Enter in kJ. -133.5 Find the change in internal energy for this reaction.
The vapor pressure of ethanol is 100. mmHg at 34.9°C. What is its vapor pressure at 53.5°C. (?Hvap for ethanol is 39.3 kJ/mol.) _____ mmHg
In molecular orbital theory: 1. What is a bonding orbital and how does it impact the strength of a bond? 2. What is an antibonding orbital and how does it impact the strength of a bond
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