A100.0ml bubble of hot gases at 225 c and 1.80 atm escapes from an active volcano, what is the new volume of the bubble outside the volcano where the temperature is -25 c and the pressure is 0.80 atm

112.08 mL

From the question we are given;

thus, T1 = 498.15 K

                                     = 248.15 K

We are required to calculate the new volume of the gases;

Rearranging the formula;

Therefore;

Therefore, the new volume of the gas is 112.08 mL

i believe you are right for all except the 3rd ( look at sqdancefan his answer is much better)

answer is: nuclear fusion produces elements that are heavier than helium.

nuclei combine to form a heavier nucleus, releasing energy.  

for example, fusion of hydrogen atoms at the sun.  

this fusion nuclear reaction is in the inner core of the sun and hydrogen (atomic number 1) is conveted into helium (atomic number 2).  

the inner core is the central region of the sun and all solar energy is produced in the core by nuclear fusion.