I )
Excess sodium hydroxide solution is added to 20.0 mL of 0.184 M ZnCl2,
calculate the mass of zinc hydroxide that will precipitate.
+
NaOH(aq)
ZnCl2(aq)
Zn(OH)2(s)
+
2NaCl(aq)
(4 marks)

If maltose undergoes hydrolysis what subunits does it results to?

If a particle has z = 25 and 23 electrons, what is its charge?

The size (radius) of an oxygen molecule is about 2.0 ×10−10m. make a rough estimate of the pressure at which the finite volume of the molecules should cause noticeable deviations from ideal-gas behavior at ordinary temperatures (t= 300k ). assume that deviatons would be noticeable when volume of the gas per molecule equals the volume of the molecule itself.