Four gases were combined in a gas cylinder with these partial pressures: 3.5 atm N2, 2.8 atm 02, 0.25
atm Ar, and 0.15 atm He.
Pr = P, + P + P + ... + P
What is the mole fraction of N2 in the mixture?
atm
Р.
па
DONE
Ps ng

2. how is heavy water different from normal water

Silver tarnishes as silver metal reacts with hydrogen sulfide, h2s, in the air. in this reaction, dark silver sulfide, au2s, covers the surface of silver. when silver is polished, this coating of silver sulfide can be removed from the surface. this makes the silver shiny again. enter the coefficients that balance the tarnishing reaction equation. (type 1 for no coefficient.)

The chemical bond connecting one nucleotide with the next one along the nucleic acid chain is called a