How many moles of H-atoms are there in 9.819 moles of C2H6? a. [4 pts ] Choose the correct operation for calculating the number of moles of H-atoms: b. [6 pts) moles of H-atoms = Unit = Suppose that you are required to calculate the number of moles for E Ar atoms. (E is a number) Avogadro's Number (N)= 6.022 1023 a. Choose the correct operation for calculating the number of moles in certain E Ar atoms: b. Given that E = 34. 35 x 1095, calculate the number of moles of Ar atoms Unit n = Consider the generic complete reaction 2 A +3B 2C Given 4.4 grams of A, calculate the mass (in grams) of B (Hint: Molar mass of A is 44 g/mol. Molar mass of B is 18 g/mol). O a. 2323.20 O b. 5227.20 O c. 1.20 O d. 2.70