How many moles gaseous BF3 are contained in a 4.3410 L bulb at 515.0 oC if the pressure is 1.220 atm?

A sample of 0.125 mol of NO2 occupies a volume of 2.15 L. What will the volume be if the number of moles of NO2 is increased to 0.725 mol, with no change in temperature or pressure ?

An oxygen sample of 1.62 L is at 0.911 atm and 30.0°C.How many moles of oxygen are in the sample?

A sample of 0.525 mol of SO2 occupies a volume of 2.25 L. What will the volume be if the number of moles of SO2 is increased to 0.825 mol, with no change in temperature or pressure ?

Select the statement that best describes the relationship between gas pressure and volume (Boyle’s law).

Use the following enthalpies of formations (∆Hof): C2H5OH(l) H2O(l) CO2(g) ∆Hof -278 kJ/mol -286 kJ/mol -394 kJ/mol to calculate the standard enthalpy of reaction (∆Horxn) for the following reaction: C2H5OH(l) + 3O2(g) → 2CO2(g) + 3H2O(l) ∆Horxn = ?

If 12.6 g of CuSO4 (molar mass 159.61 g/mol) is dissolved in water to make a 0.350 M solution of CuSO4, what is the volume of the solution in milliliters? Show all your work for full credit. Use the correct number of significant figures.

What are the bond angles around a central atom with sp hybridized orbitals?

How much energy is evolved during the formation of 102 g of Fe, according to the reaction below? Fe2O3(s) + 2 Al(s) → Al2O3(s) + 2 Fe(s)         ΔH°rxn = -824 kJ

A sample of chlorine gas is confined in a 5.0 L container at 0.433 atm and 37oC. How many moles of gas are in the sample?