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A particular gas exerts a pressure of 3.38 bar. What is this pressure in units of atmospheres? (1 atm = 760 mm Hg = 101.3 kPa = 1.013 bar) Must submit required work

A balloon has a volume of 2.37 liters at 24.0°C. The balloon is heated to 48.0°C. Calculate the new volume of the balloon. Must submit required work

A flexible vessel contains 14.00 L of gas at a pressure of 1.27 atm. Under the conditions of constant temperature and constant number of moles of gas, what is the volume of the gas when the pressure of the vessel is decreased by a factor of two? Must submit required work

For an ideal gas, which two variables are directly proportional to each other (if all other conditions remain constant)? 1. T and n2. V and n 3. V and T

If 10.1 g of naphthalene, C 10H 8, is dissolved in 105.0 g of chloroform, CHCl 3, what is the molality of the solution?

The concentration of H 3O + in a solution is 4  × 10 –4 M at 25°C. What is its hydroxide-ion concentration?  Note: Written work required Hint: Kw = 1.01 × 10–14

Which equation depicts the hydrogen phosphate ion (HPO 4 2–) behaving as a Brønsted –Lowry base in water?

Consider the reaction NH 3( aq) + H 2O( l) NH 4 +( aq) + OH –( aq). K b for NH 3 is 1.8  × 10 –5 at 25°C. What is Ka for the NH 4 + ion at 25°C? Note: Written work required Hint: Kw = 1.0 x 10-14

For a monoprotic acid titration, the _____ in a titration is the point where number of moles of a strong base added equals the number of moles of an acid initially present.

What is the pH at the equivalence point when a 25.0 mL sample of 0.200 M aqueous formic acid (HCO 2H) is titrated with 0.100 M aqueous potassium hydroxide? ( K a of HCO 2H = 1.8 × 10 –4) Note: Written work required Hint: Weak acid + strong base titration problem