Bài 1. Tính khối lượng(m) của: a) 0.4 mol nguyên tử nhôm a1) 1,125 mol thuốc tím KMnO4
b) 0,125 mol sắt b1) 0,2 mol chì
c) 0,1 mol Khí oxi c1) 0,15 mol BaSO4
d) 0,5 mol Cl2 d1) 0,25 mol Al(OH)3
e) 0,75 mol khí nito e1) 0,45 mol Mg(NO3)2
f) 1,15 mol kẽm f1) 1,5 mol muối ăn NaCl

(Al=27, Fe=56, Pb=207, O=16, Ba=137, S=32, Cl=35,5 N=14,
Mg=24, Zn=65, Na=23, K=39, Mn=55)

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.