Answer : 5.405 moles of
are equivalent to 97.3 grams of 
Solution : Given,
Mass of
= 97.3 g
Molar mass of
= 18 g/mole
Formula used :

or,

Now put all the given values in this formula, we get the moles of 

Therefore, 5.405 moles of
are equivalent to 97.3 grams of 
The answer is the last one (it needs a medium through which to travel) it is not true about radiation. A radiation is the emission of energy in the form of waves or particles through space or through a material medium. This includes; electromagnetic radiation, such as a radio wave, microwaves, visible light, x rays, and gamma radiation.
The element with atomic number 71(lutetium) is paramagnetic
This is because all its electrons is not paired . lutetium has electron configuration of (Xe) 4f^14 5d^1 6S^2
Its 5d sub shell is not paired since the d sub shell can accommodate a total of 10 electrons hence lutetium is paramagnetic
The answer is that a full octet makes the noble gases nonreactive. Hope this helps
Answer:
It covers changes to the position of equilibrium if you change concentration, pressure or temperature. ... If a dynamic equilibrium is disturbed by changing the conditions, the position of equilibrium moves to counteract the change
Explanation: