Answer to Question #169956 in Inorganic Chemistry for Emmanuel Rado

Question

b)  Answer the following stoichiometry questions by referring to the equation below:

2        KClO₃         ---->      2 KCl + 3 O₂

i.        If 1.50 mol of KClO₃ decomposes, what is the mass of O₂ that will be produced?

ii.       If 80.0 grams of O₂ was produced, how many moles of KClO₃  are decomposed?

iii.    Find the mass of KClO₃ needed if we need to produce 2.75 mol of KCl.

Answer 1

i)moles of O2 produced are 4.5 moles

Rmm = 32

Mass=32 × 4.5= 144g

ii) $Moles= mass/rmm$

=122.6 /80

=1.53moles

iii) moles of 2.75/2= 1.375moles

Mass= 1.375× 122.6=168.6g