How many grams of O2 would be needed to produce 1.875 moles of aluminum? 4 Al + 3 O2 -> 2 Al2O3

In which of these cases are the two wave points considered to be in phase with each other?

Ais a mountain created from eruptions of lava, ash, rocks, and hot gases.

What rule is used to determine how many covalent bonds an element can form? a. the number of covalent bonds is equal to six c the number of covalent bonds is equal to five minus the group number plus the group number b. the number of covalent bonds is equal to eight d. none of the above minus the group number select the best answer from the choices provided