I. Find the molar mass for each compound. Round to the nearest percent. 1) Iron (II) oxide

2) C6H12O6

3) Carbon dioxide

4) Calcium carbonate

II. Convert from grams <---> moles and vice versa

1) 72.06 g of C to moles

2) 3.5 moles of H2O to grams

3) 63.9 g of CH4 to moles

4) 5.8 moles of CaCO3 to grams

12 is probably the typical age for a first kiss but i think its to young.

Answerthis solution will not form a precipitateexplanationsolubility equilbrium:         pbf₂(s)  ⇄ pb²⁺(aq) + 2 f⁻(aq)the solubility product expression is    (we exclude solids from the equilibrium expression).now suppose we have the trial ion product q, which we can define as    then, we can interpret  q as the product of the concentration of the ions that we have and ksp as the product of the ion concentrations that are needed to form a saturated solution.if q > ksp, then that implies that there will be a surplus of ions that exceed the amount that is required to form a saturated solution. a precipitate will then form (the precipitate continually  forms until the surplus ions are removed and q is decreased to ksp's value).if q = ksp, the saturated solution that forms is barely saturated and the precipitate will be minimal.if q < ksp, then the ion concentration will not be enough to form a saturated solution (so no precipitate).using our information, we calculate the trial ion product:     since q = 2.7  × 10⁻⁸ < ksp =  4  ×  10⁻⁸, a precipitate will not form.