9. Consider section 10.4 (The Ideal Gas-Equation) in your textbook and our Aug 30 lecture. Imagine that you have 0.80 mol of kryptonite gas enclosed in a 500-ml platinum vessel equipped with a
manometer. The manometer reads 550 psi, What is the temperature (Kelvin) of the kryptonite gas in
the vessel? (NB: the gas constant value
for this situation is expressed as 0.08206 L-atm/mol-K).

so here we go

atomic mass

239 + 1 = y + 134 + 3 combine like terms

240 = y + 137             subtract 137 from both terms

240 - 137 = y

103 = y

atomic number

94 = z +54 + 0

94 = z + 54               subtract 54 from both sides.

40 = z

answer

answer:

technetium is the most reactive. this is followed by silver. the least reactive out of these three elements is strontium.

it is b that is the answer.