Question

Molar mass (g/mol) 180 30 63.54 #of moles 1.805 x 103 0.4827 0.0284 1. Complete the table below. Substance Mass (g) a. Aspirin tablet (C.H.O.) 0.325 b. Wooden stick 14.482 (CH-0). c. Copper wire (Cu) 1.809 Show work below. a. CqHq Oy =9x12 + 8x1 + 4 x 16 = 180 g/mol b. CH₂O = 12 x 1 + 2x1 + 16x1 = 12 + 2 + 16 =30g/mol 170 g/mol = 0.00 105 males = 1.805.810 moles 14.482 9 = 0. 27 moles 30 glomol 63.54 glmal = 1.0019 63.59 glad = 6.28 moles 2. A substance has a mass of 90.10 grams and contains 3.02 x 10" molecules. Which of the 3 substances in the chart above is it? Explain.

Answer 1

Formula Used- Moles = mass Molar Mass Moles = No. of molecules mnolom NA NA = 6.023 x 1023 no. of molecules mole Molor Mass (g/mol) Compound go Cq Hg Ou си, о 180.168 /mol 30.03 g/mol 63.55 g/mol cu (@) Aspirin tablet → 23 0.3259 2 " Moles of Aspirin = = 180x10 moles 0.325 g 180.16 g Imol 16 14.482 g wooden stick - (CH₂O) : moles of CH₂O = = 0.482 moles 14.482g 30.03 g/mol (e) copper wire 1.809g i moles of Cu = 1.809 g 63.55 g/mol = 2.85 x 10 moles J

As we know - blo Moles = = Mass Molar Mass No. of molecules 6.023 x 1023 plugging Values - - 90.10 g Jomile di Mi 3.02 x 1023 molecules 6.023 1023 at M = 179.7 g/mol (180 g/mol Hence, substance is Aspum (Cq Hq Oy) Please Rate or lo