It’s C because wood isn’t easy to get heat through while metal can heat up quickly.
The penetrating power of alpha rays, beta rays, and gamma rays varies greatly. Alpha particles can be blocked by a few pieces of paper. Beta particles pass through paper but are stopped by aluminum foil. Gamma rays are the most difficult to stop and require concrete, lead, or other heavy shielding to block them.
I think the answer you are looking for is .18 moles
1) use the formula PV=nRT
2) Plug in given values: P(8.77 L)= (1.45 mol)(0.0821)(293 K)
3) isolate P: P= (1.45x.0821x293)/(8.77)
4) solve: P=3.98 atm
Nonmetal-Nonmetal is Covalent bond
Nonmetal-Metal is Ionic bond
Metal-Metal is Metallic bond
