A nuclear reaction involves the reaction of nuclei of atoms. This can be expressed in the form of nuclear equation in which the reactant nuclei are represented by their respective symbols carrying two numbers, the mass number denoted by A present at the top left and the atomic number (Z) written at the bottom left of the symbol of the element's nucleus.
The given nuclear reaction is the fusion of two isotopes of hydrogen, H-2 to form Helium-3 nucleus:

This reaction produces a single neutron.
Answer:
The last digit in any measured quantity of a tool is the minimum it can measure so
5 books ---- Exact number
5 lb ---- measured
9.23 g----- measured
9.035Kg measured
12 roses ------ exact
12 inches in 1 foot ----- exact
361 miles ------- measured
100 cm in 1 m ------- exact
The number of grams : 17.082 g
<h3>Further explanation</h3>
Molarity shows the number of moles of solute in every 1 liter of solute or mmol in each ml of solution

Where
M = Molarity
n = Number of moles of solute
V = Volume of solution
453.9 mL of 0.237 M calcium acetate

MW Ca(C₂H₃OO)₂ : 158,17 g/mol

I’m not sure I really wish I could help you