The value of ΔH° for the following reaction is 3351 kJ: 2Al (s) + 3O2 (g) → 2Al2O3 (s)

The value of ΔH°f for Al2O3 (s) is kJ.

-16.43

-1676

-32.86

+1676

How many moles of carbon dioxide will form if 2.5 moles of c3h8 is burned

How many moles of sulfuric acid (h2so4) are needed to react completely with 6.8 moles of lithium hydroxide (lioh)? 2lioh + h2so4 → li2so4 + 2h2o a. 3.4 mol h2so4b. 6.8 mol h2so4 c. 10.2 mol h2so4 d. 13.6 mol h2so4

At a certain temperature the rate of this reaction is first order in hi with a rate constant of : 0.0632s2hig=h2g+i2g suppose a vessel contains hi at a concentration of 1.28m . calculate how long it takes for the concentration of hi to decrease to 17.0% of its initial value. you may assume no other reaction is important. round your answer to 2 significant digits.