How many molecules of ethane (C2H6) are present in 0.875 g of C2H6? ?

Iknow the answer to 13 is b and 14 is d. i just need to know why the correct answers are correct

Which atom or ion is the largest? 0 a. 0 0 0 0 e. li

Which formula can be used to calculate the molar mass of ammonia (nh3)? molar mass of n + molar mass of h 3 × molar mass of n + molar mass of h molar mass of n + 3 × molar mass of h 3 × molar mass of n + 3 × molar mass of h