The weights of chickens for sale in a shop are normally distributed with a mean of 2.5
kg and a standard deviation of 0.2kg A
chicken is chosen at random. Find the value
of weight in kg above which 20% of
chickens mark to pts
0 2.33
O 2.57
O 267
O 288​

Calculate the ratio of h+ ions to oh– ions at a ph = 7. find the concentration of h+ ions to oh– ions listed in table b of your student guide. then divide the h+ concentration by the oh– concentration. record this calculated ratio in table a of your student guide. compare your approximated and calculated ratios of h+ ions to oh– ions at a ph = 7. are they the same? why or why not? record your comparison in table a. what is the concentration of h+ ions at a ph = 7? mol/l what is the concentration of oh– ions at a ph = 7? mol/l what is the ratio of h+ ions to oh– ions at a ph = 7? : 1