Calculate the molar mass of Zinc given that there are five naturally occurring isotopes. Show all work

Zinc - 64. 48.89%
Zinc - 70, 0.62%
Zinc - 66, 27.81%
Zinc - 67, 4.11%
Zinc - 68, 18.57%

For which one of the following reactions is the value of δh° rxn equal to δh° f for the product? a. 2 h2 (g) + o2 (g) → 2 h2o (l) b. n2 (g) + o2 (g) → 2 no (g) c. 2 h2 (g) + o2 (g) → 2 h2o (g) d. h2o (l) + 1/2 o2 (g) → h2o2 (l) e. none of the above

For each of the following compounds, decide whether the compound's solubility in aqueous solution changes with ph. if the solubility does change, pick the ph at which you'd expect the highest solubility. you'll find ksp data in the aleks data tab. compounds does solubility change with ph

Which three statements represent the benefits of performing experiments using computer simulations?