The product of electron capture by Polonium-218 () is:

Identify whether each of the following constant temperature and pressure processes/reactions listed below result in an increase (∆S > 0) or decrease (∆S < 0) in the system's entropy

You prepare a saturated solution of sodium carbonate (Na2CO3) by adding a large mass of it to a beaker of pure water where the following dissolution reaction occurs: Na2CO3(s) ßà 2Na+(aq) + CO32-(aq); KSP = 120 at 298K Given a solubility product equal to 120 (i.e. KSP = 120 ),the equilibrium molarity of Na+(aq) ions in the saturated solution will be:       

Lead-214 () can result from Radon-222 ()  undergoing:

Using the following table of average bond enthalpies, calculate the value of △H{“version”:”1.1″,”math”:”△H”} for the chemical reaction shown here: 2NH3 → N2 + 3H2 Note: the bonding for N2 is a triple N≡N bond; all other bonds are single covalent bonds

You add 0.04 moles of the weak acid formic acid (pKA = 3.75) to 1L of H2O, at equilibrium the pH would be:

For the following chemical reaction: 3 CO2(g) + 10 H2(g)  à  C3H8(g) + 6 H2O(l)   utilize the provided table of thermodynamic data to calculate the standard state reaction enthalpy . 

The half-life for the transmutation of Radon-222 () to Lead-214 ()  is 3.8 days.  If there is an initial mass of 100.0 g of Radon-222, how much Radon-222 would remain after 7.6 days?

Select all of the molecules listed below that could form hydrogen bonds with molecules of ethanol (CH3OH)

Order the following objects from lowest (1) to highest(3) kinetic energy.