Critical mass is A) the minimum amount of fissionable material ...

[SO00]

Critical mass is
 
  A) the minimum amount of fissionable material that will sustain a chain reaction.
  B) the maximum amount of fissionable material that will sustain a chain reaction.
  C) the amount of fissionable material that produces the most energy when split.
  D) the largest amount of fissionable material that can be obtained from isotopic enrichment.

Question 2

The main function of a builder is to reduce water hardness.
 
  Indicate whether the statement is true or false

[canderson530]

Answer to Question 1

A

Answer to Question 2

TRUE

[SO00]

Gracias!

[mochi09]

Excellent