. 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

Agas is contained in a thick walled balloon when the pressure changes from 1.21 atm to 2.52 the volume changes from 3.75 l to 1.72 l and the temperature change from 293k to blank k

Which of the following statements about acidic water is true? a. acid has no effect on the h,o molecules. b. the solution contains a larger number of oh ions than h,o ions. c. the solution contains a larger number of h,o ions than qh ions. d. the solution contains an equal number of h,o ions and oh ions. none of the above e.

Consider the elements bromine and chlorine; which elements has a larger ionic radius ?