You prepare a solution by dissolving 5.23 grams of Iron (II) nitrate in enough water to
make 256.0 cm3 of solution. What is the concentration of the solution?

I keep getting 0.05 M but it says it's wrong. Can anyone explain how to do it?

1.solid

2.carbon dioxide

3.helium

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.  

the answer is 2-methylbutane. i just took a quiz and i got it wrong and this is what my teacher sai the correct answer was.