The yellow liquid iodine pentafluoride reacts vigorously with water to give a mixture of iodic acid and hydrofluoric acid.

a. Write a balanced chemical equation for this reaction.
b. Determine the concentration (in moles per liter) of each of the acids that result from the complete reaction of 3.91×10-2moles of iodine pentafluoride with enough water to give a solution volume of 888 mL.

a) F₅I + 3 H₂O ⇒ HIO₃ + 5 HF

b)  HIO₃ 4.40×10⁻² M

    HF  2.20x10⁻¹ M

Explanation:

Once we have balanced the equation we use stoichiometry to calculate the amount of product formed. Looking at the equation, we can see that the reaction of  1 mole of  H₅I with 3 moles of water yields 1 mole of HIO₃ and 5 moles of HF, respectively.

Therefore, we can calculate:

For HIO₃:

1 mole F₅I   1 mole HIO₃

3.91×10⁻² moles F₅I x= 3.91×10⁻² moles HIO₃

For HF:

1 mole F₅I   5 moles HF

3.91×10⁻² moles F₅I x= 1.95x10⁻¹ moles HF

However, these moles are contained in 888 mL, to calculate the concentration in molarity we need to calculate the moles present in 1 liter, or 1000 mL of volume (this comes from the definition of molarity).

Then, for HIO₃:

888 mL 3.91×10⁻² moles HIO₃

1000 mL x= 4.40×10⁻² moles HIO₃

For HF:

888 mL 1.95x10⁻¹ moles HF

1000 mL x= 2.20x10⁻¹ moles HF

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.