If 25.0 mL of a 2.00 M CaCl2 solution is used for the reaction
shown above, how many moles of chloride ions were involved
in the reaction?__moles

0.1 moles of chloride ions were involved  in the reaction if 25.0 mL of a 2.00 M CaCl2 solution is used for the reaction.

Explanation:

Data given:

volume of Ca = 25 ml 0r 0.025

molarity of the calcium chloride solution = 2M

number of chloride ions =?

Balance chemical reaction:

Ca + 2 ⇒

number of moles in 25 ml is calculated as:

molarity =

number of moles of calcium chloride  = molarity x volume

putting the values in the equation:

number of moles = 2 x 0.025

                            = 0.05 moles of calcium chloride

1 mole of  Ca  decomposes as 1 calcium ion and 2 chloride ions

so 0.05 moles will have x moles of chloride ion

=

x= 0.1

0.1 moles of chloride ions will be involved in the reaction.

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.