Question

2. Menerva has 1 mol of AICI. How many moles of ions are there in 1 mol of AICI:? a. I mol i mo 10 lat b. 2 mol miza c. 3 mol d. 4 mol e, 6 mol Answer: 3. Jessica has 64.0 g of sulfur dioxide (SO2). How many oxygen atoms are there in 64.0 g of SO2? a. 64 atoms b. 128 atoms c. 6.022 x 10” atoms d. 1.806 x 10 4 atoms c. 1.204 x 102 atoms Answer 4. Amenda wants to differ the oxidation and reduction. Which of the following is NOT an oxidation? a. Loss of electron b. Loss of oxygen c. Loss of hydrogen d. Increase of oxidation state Answer: 5. Shqiponja burned heptane (C.H..) in the air CHis(l) +1102(g) → 7CO2(g) + 8H2O(g). Which of the following is NOT correct for this reaction? a. 11 mol of O, reacts with 1 mol of CHis reacts. b. C His is a solid. C. CO2 is a gas. d. I mol of C7H16 produces 8 mol of H.O. Answer: 6. Tfeoma has the following elements. Which of the following contains the greatest number of atoms? a. 12.011 g of carbon b. 32.064 g of sulfur c. 65.37 g of zinc d. All above contain the same number of atoms. Answer:

Answer 1

(2) To find the moles of ions are there in 1 mol of AICI: It will dissociates AlCl, → A13* +3C1 Im ole of AlCl, gives Im ole of A13+ and 3moles of Ci“ ions So the moles of ions=1+3 = 4moles Hence the moles of ions are there in 1 mol of A1C1 = 4m 01 Answer is option (d)

(3) To find the oxygen atoms Given that 64.0g of So, First find the moles of So, mass moles = molarm ass molarmass of SO, = 64.066g/mol 640g moles= ** 64.066g/mol = Imol To find the moles of oxygen Imole of So, produces 2 moles of oxygen Therefore moles of oxygen = 2 moles To find the atoms of oxygen Avogadro's constant says that Imole of any atom contains 6.022 x 10" atoms 1 mole = 6.022x10" atoms So 2 moles of oxygen = 2x6.022x102 atoms = 1.204 x 10* atoms Hence the atoms of oxygen = 1.204 x 1024 atoms Answer is option(e)