Question 11 (1 point) How many moles of O2 are required to produce 9.45 moles of Al2O3 during the following reaction:
4 Al + 302
2A1203
O a
Ob
14.3 mol 02
3.15 mol 02
6.30 mol O2
0.139 mol O2

Which of the following has expanded our knowledge of the universe beyond our solar system the most? a. manned space travel b. the hubble space telescope c. the pioneer and voyager missions d. the international space station