Thallium has got 81 protons
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Molarity
Molarity is a unit used to express the concentration of a substance, and it is defined as the number of moles of solute per decimeter cubed (liter) of solvent.
Answer:
2nd one down
Explanation: distance divided by time interval
12+12+6(1)+16 =46 46*.251 = 11.546 gram