Perform the following conversions between energy units. a) 341  kJ  =  ×10 J b) 3315 kcal  =  × 10 kJ c) 8.03 ×106 J  =  × 10 kcal

An open flask sitting in a lab bench looks empty, but it is actually filled with a mixture of gases called air. If the flask volume is 1.00 L, and the air is at standard temperature and pressure, how many gaseous molecules does the flask contain ?

In the fermentation process, yeast converts glucose to ethanol and carbon dioxide. What volume of carbon dioxide, measured at 745 torr and 25.0°C, can be produced by the fermentation of 24.0 g of glucose? C6H12O6(aq)  → 2C2H5OH(aq)   + 2CO2(g)

Describe the relationship between gas volume and number of moles when the pressure and temperature are both held constant (Avogadro’s law).

An antacid tablet contains NaHCO3. What mass of this compound is required to neutralize 75.0 mL of 2.75 M HCl? NaHCO3(aq) + HCl(aq) → NaCl(aq) + CO2(g) + H2O(l)

How many milliliters of 12.0 M HCl(aq) are needed to prepare 0.510 L of 1.00 M HCl(aq) ?

In the fermentation process, yeast converts glucose to ethanol and carbon dioxide. What volume of carbon dioxide, measured at 745 torr and 25.0°C, can be produced by the fermentation of 16.0 g of glucose? C6H12O6(aq)  → 2C2H5OH(aq)   + 2CO2(g)

What is the final volume of a sample of gas initially occupying 2.50 L at 9.0oC and 1.25 atm pressure after its pressure is increased to 3.75 atm and its temperature is increases to 78.0oC?

Draw the Lewis structure of SCl4 on your exam work paper, which you will submit under Exam 5 work Apply VSEPR theory and answer each of the following questions on the exam: a) Total number of valence electrons. valence electrons b) Number of lone pairs on central atom. lone pairs c) Molecular Geometry. shape d) Polar or Nonpolar. molecule

If a gaseous mixture is made by combining 3.71 g of Ar (0.0929 moles) and 3.74 g of Kr (0.0446 moles) in an evacuated 2.50 L container at 25.0oC (298K). What is the partial pressure of Ar in atm? PAr = atm What is the partial pressure of Kr in atm? PKr = atm What is the total pressure exerted by the gaseous mixture in atm? Ptotal = atm