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Choose the correct enthalpy change, ΔH° and heat transfer for the following reaction             C 3H 8(g)   5O 2(g)    →    3CO 2(g)   4H 2O(l)  ΔH°f (kJ/mol)    -103.85   0.00     -393.50   -285.80

A very large nucleus tends to be unstable because of the

The [SO42-] in a saturated solution of PbSO4is (Ksp= 1.1 x 10-8)

An alpha particle is a ……………… nucleus

Will PbI2 precipitate when the Mixture 2 solutions (10 mL 0.01 M Pb2+  + 5 mL 0.01 M I- in 35 mL water) are combined? Ksp for PbI2 is about 10-8                                              PbI2(s)  ↔  Pb2+(aq)  +  2I-(aq) Choose (A) or (B)

What is the name of the acid:  CH3COOH?

Determine the [H3O+] in 0.265 M HClO solution. The Ka of HClO is 2.9 X 10-8.

Calculate the pH of 0.075 M KOH solution Hint: Identify KOH as an acid or base. Based on the acidity or basicity, calculate the appropriate p-value (pH or pOH).  pH = -log [H+] pOH = -log [OH-]

To determine the solubility of a solute in water, one must be prepare a solution that is:

Identify the missing particle in the following nuclear reaction   23992U  + 42He → _____ +10n