. 4Al + 3O2 → 2Al2 O3 In this reaction, how many moles of O2 are required to completely react with 200 grams of Al? The molar mass of Al is
27 g/mol.
A. 4050 mol O2
B. 5.55 mol O2
C. 7.41 mol O2
D. 9.88 mol O2

what's the

aquifers are bounded above and below by impermeable rock. the driving force of groundwater movement in confined aquifers is pressure, rather than gravity.

substituting a hydrogen atom with a halogen in a hydrocarbon:

- the single bond remains single. a is wrong.

- the bond with hydrogen is as strong as with a halogen. c is wrong

- a hydrocarbon is saturated if there is no double bond. we do not know that so d is wrong.

- carbon will always have four valence electrons. e is wrong.

by elimination, the correct answer is b. the boiling point of the new compound increases.