Answer:The process of a solid becoming a liquid is called melting
Explanation:
Answer:
Explanation:
Half life of Nobelium-253 is 97 seconds . That means after every 97 seconds half of the Nobelium amount will be disintegrated .
Time taken in bringing the sample to laboratory = 291 seconds
291 second = 291 / 97 half life
n = 3
N = 
N₀ is original mass , N is mass after n number of half life.
N = 5 mg x 
= .625 mg
Only 0.625 mg of Nobelium-253 will be left .

so:



so:

it means that
in

of acid there is

moles of acid

so:

it means that:
in

of water there is

moles of water
therefore:

So your answers are:

and the mole fraction is:
They are corrosive wastes as they can corrode metal
hope that helps