The answer in this question is FALSE. Hydrogen atom has electronic configuration 1s^1. It needs only one more electron to make a closed sub-shell. Therefore, a stable hydrogen atom does not have an octet but a duplet. Therefore, the statement is false.
First of all, lets get our equation for Kinetic Energy (KE).
KE = 1/2 (mass) (speed)2
<span>Now, replace the words by adding the actual values. </span>
KE = 1/2(2 kg) x (45 m/s)^2
KE = 2025 J
Answer: Kinetic energy = 2025 Joules
PV = nRT
Pressure times volume = number of moles times ideal gas constant times temperature
50mL = .05L
1 atm (.05) = n (.0821) (273)
.05 = n (22.4133)
.022 = n (number of moles)
6.022E23 molecules = 1 mole
.022 x 6.022E23 = 1.325E23 molecules