Manipal MET2015ChemistrySome Basic Concepts of Chemistry
How many moles of Al ₂ ( SO ₄ )₃ would be in 50 g of the substance?
Options
- A0.0843 mol
- B0.952 mol
- C0.481 mol
- D0.140 mol
Correct answer
D. 0.140 mol
Step-by-step solution
Number of moles = Mass Molecular mass Given, mass of Al ₂ ( SO ₄ )₃=50 ~g Molecular mass of aligned & Al ₂ ( SO ₄ )₃=2 27+3(32+4 16)=342 ~g & moles of Al ₂ ( SO ₄ )₃= 50 342 =0.14 ~mol aligned