A buffer solution is prepared by adding NH4Cl to a solution of NH3 (ammonia). what happens if NaOH is added? NH3(aq)+ H2O(l) = NH4+(aq) +OH- (aq)​

Calculate the number of molecules present in 0.750 mol of mgo.

He table below gives the atomic mass and relative abundance values for the three isotopes of element m. relative abundance (%) atomic mass (amu) 78.99 23.9850 10.00 24.9858 11.01 25.9826 what is the average atomic mass (in amu) of element m? 2.86 5.36 24.30 24.98

Oil rich countries in the middle east cover about 4% of earths total land area but prossess about 48% of the worlds known oil reserves what is the main reason for high concentration of reserves in this part of the world