SECTION B - THEORY Answer all
la Define (1) Atomic number (ii) Mass number
(4mks)
Elements x and y have the following electronic configurations
X - 152 2s 2p O
Y - 152 2s 2p 3s
Na​

Liquid from a brewery fermentation contains 10% ethanol and 90% water. part of the fermentation product (50,000 kg/h) is pumped to a distillation column on the factory site. under current operating conditions, a distillate of 45% ethanol and 55% water is produced from the top of the column at a rate of one-tenth that of the feed. what is the composition of the waste "bottoms" from the still?