A. When concentrated sulfuric acid is added to water, dissociation takes place in two stages.
stage 1
H2SO4 = H+ + HSO4-
stage 2
HSO4 = H+ + SO42- Ka2 = 1.0 * 10-2
Ka2 is the acid dissociation constant Ka2
(i) Write the expression for the acid dissociation constant Ka2.
(ii) H2SO4 is considered a strong acid whereas HSO4 is considered a week acid

Suggest how the magnitude of the acid dissociation constant for stage 1
compares to Ka2.

under a microscope, cancer cells may look very different from normal cells. they often have different sizes and some may be larger than normal while others are smaller. cancer cells are often abnormally shaped and the control centre of the cell (the nucleus) may have an abnormal appearance.

i think? ?

(newtons first law)

conservation of momentum law states :

momentum before collision = momentum after collision

momentum p (kg-m/s)= mass * velocity

say moving car=1 000 kg, velocity = 10 m/s then p = 1 000*10= 10 000 kg-m/s

say still car = 2 000 kg, velocity = 0 m/s then p = 2 000* 0 = 0 kg-m/s

total momentum prior to collision = 10 000 + 0 = 10 000 kg-m/s

momentum after collision = 10 000 kg-m/s

mass now = 1 000 kg+2 000 kg = 3 000 kg

10 000 = 3 000 kg* velocity m/s

10 000/3 000 = velocity

3.33 m/s = velocity after collision

an impulse is a force applied over time , momentum is exclusive of external forces and a perfect collision is implied