5)Given the redox reaction in an electrochemical cell:
Ni(s) + Pb2+(aq) + Ni2+(aq) + Pb(s)
A salt bridge is used to connect
A) Ni(s) and Pb(s)
B) Pb2+(aq) and Ni2+(aq)
C) Ni(s) and Ni2+(aq)
D) Pb2+(aq) and Pb(s)

Find the number of moles of argon in 364g of argon.

The comparison of the number of atoms in a copper coin the size of a penny with the number of people on earth is made to illustrate which of the following? a. that atoms are indivisible b. that atoms are very small c. that atoms are very large d. that in a copper penny, there is one atom for every person on earth

Pinene is an unsaturated hydrocarbon found in pine resin. if pinene has m+ = 136 and contains 1 double bond(s) and 2 ring(s); what is its molecular formula? enter the formula in the form ch first, then all other atoms in alphabetical order; do not use subscripts. the formula is case-sensitive