From the indicated equation Zn + 2 HCl = ZnCl2 + Hy if 7.56 moles of HCI are used with Zn, how many moles of the product HZnCl2 would be formed?

A)5.20 mol
B)0 15.12 mol
C)3.78 mol
D)2.58 mol

c. heat could easily travel through the molecules in the air and escape/enter the flask. removing the air slows down the heat transfer.  

it forms an anion that has a larger radius. anions have a negative charge and are larger than the original atom.