Explanation:
Hi for this one u just need to remember and use the equation.

then u find mr of potassium which is 39.1.
then u do

you get the answer as 0.5115 write ur answer to 3 significant figures which will be 0.512 moles .
hope this helps :)
Answer: 1.73L
Explanation:Please see attachment for explanation
What they have in common is that they both have the same number of atoms.
A colored line, as long as it is one single piece, not broken