Consider this combination reaction:

2Mg (s) + O2 (g) →2MgO (s) ΔH=-1204 kJ

What is the enthalpy for the decomposition of 1 mole of MgO (s) into Mg (s) and O2 (g) ?

What is the key difference that causes the atoms of one element to differ from the atoms of the other elements? A the number of neutrons B the number of protons C the number of electron shells D the number of isotopes

what is a example of chemical weathering. A) erosion of land caused by receding glaciers. B) the layer of oxide formed on statues made of metal. C) deposition of silt along the bank of the Mississippi River.

What is the cathode

As heat is added to a tube of gas, which is the most likely phase transition to occur in the tube? gas to plasma gas to liquid gas to solid gas to element

Discuss the three broad areas of Financial Decision Making

What river basin provide river water to charolette and gastoia?

8. Calculate the molar mass of an alkane with the mole- cular formula C H18.

What is DNA? What information does it carry? Where is DNA located?

5. Differences in which property allow the separation of a sample of sand and seawater by filtration? A) concentration of ions B) volume of sample C) mass of sample D) particle size

Describe the reaction of a weak acid and a strong base. In general, what will the final pH be when the reaction between equal moles of a weak acid and a strong base is complete?