Answer:
Polling is a method used for the purification of copper or tin which contains oxide impurities
Answer:
Option B. 0.285m NaCl
Explanation:
To find the molality, first let find the number of mole of NaCl in the solution. This is illustrated below
Molar Mass of NaCl = 58.5 g/mol
Mass of NaCl = 10g
Number of mole of NaCl = Mass of NaCl / molar Mass of NaCl
Number of mole of NaCl = 10/58.5 = 0.1709mol
Mass of water = 600g = 600/1000 = 0.6kg
Molality = mole of solute / mass of solvent
Molality = 0.1709mol/0.6kg
Molality = 0.285mol/Kg
Data that can be measured, deals with numbers and length,height,area,volume etc.
D)plastic copper
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