Which of the following are all associated with the immune system? 0 а
Ob
Calves, muscles, eyes
White Blood cells, Bone marrow, Skin
Lungs, Tendons, nails
Brain, Toes, Heart
Ос
Od

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

)benzene and toluene form nearly ideal solutions. consider an equimolar solution of benzene and toluene. at 20 °c the vapour pressures of pure benzene and toluene are 9.9 kpa and 2.9 kpa, respectively. the solution is boiled by reducing the external pressure below the vapour pressure. calculate (i) the pressure when boiling begins, (ii) the composition of each component in the vapour, and (iii) the vapour pressure when only a few drops of liquid remain. assume that the rate of vaporization is low enough for the temperature to remain constant at 20 °c.

How many moles of lead are in 1.50 x 10^12 atoms of lead? could you explain the answer as well and not just give it to me i am refreshing for finals and i need to know how to do it