How much energy (in calories) is required to convert 53.21 grams of Ethanol from -10 °C to 50 °C?

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

If 10.g of agno3 is available, what volume of 0.25 m agno3 can be prepared

Which element forms an ionic bond with flourine? 1) fluorine 2) carbon 3) potassium 4) oxygen