Mercury(II) bromide

Mercury and bromine will react with each other to produce mercury(II) bromide.
a.)What mass is produced from the reaction of 10.0g Hg and 10.0g Br2?What mass of which reagent is left unreacted?

b.)what mass of HgBr2 is produced from the reaction of 5.00mL of mercury?(d=13.5g/mL) and 5.00mL of bromine(d=3.12g/mL)?

If someone could give me a clue where to start? My High school had a terrible chemistry program, i've never seen any of this before.

Please, any help would be appreciated.


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