Serum taken from a patient being treated with lithium for
manic-depressive illness was analyzed for lithium concentration. a
reading of 212 units was obtained for the intensity of the 671 nm
red emission line. then 1.00 ml of a 11.2 mm lithium standard was
added to 9.00 ml of serum, and this spiked serum gave an intensity
reading of 546 units. what is the original concentration of li in
the serum?

Ch4 is nonpolar and insoluble in water. since all of the hydrogen atoms are evenly spread around the carbon atom even through the c h bond is polar all the poles cancel each other out.

The activity series is shown in the attached picture. if the element is below the other, then you can displace the other. following the activity series as a guide, the reactions are as follows: nickel and aluminum chloride3 ni + 2 alcl₃  → 3 nicl₂ + 2 albarium and copper bromideba + cubr  →  no reaction because cu is less oxidizable than bapotassium nitrate and aluminum3 kno₃ + al  → al(no₃)₃ + 3 ksodium phosphate and zincnaso₄ + zn  → znso₄ + na