Hexamethylene tetraamnie, N4(CH2)6, is to be produced in a well-stirred semibatch reactor by adding aqueous ammonia solution at a constant rate of 10 liters/min. to an initial charge of formalin solution [formaldehyde (HCHO) in water]:

6HCHO + 4NH3 → N4(CH2)6 + 6H2O

The reaction is instantaneous, irreversible, and exothermic. The initial charge of formalin solution is 2000 liters with a formaldehyde (A) concentration, CAi, of 15.0 gmol/liter. The concentration of ammonia (B) in the solution is CB = 15.0 gmol/liter.

Required:
Calculate the time required for complete consumption of formaldehyde.

a rain shadow is a dry region of land on the side that is protected against the prevailing winds of a mountain range. the prevailing winds are the winds that occur most of the time in a particular place of the earth

prevailing winds carry air toward the mountain range. as the air rises up over a mountain range, the air cools, water vapor condenses, and clouds form. on this side of the mountains, called the windward side, precipitation falls in the form of  rain  or snow. this dry air produces a  rain shadow.

im pretty sure its b

yes

ya te ayud espera

a. the law of proportion states the combination of 2 atoms in a specific ratio to produce multiple compounds such as the given statement of question ‘1st compound contains 88.8 % cu ’ indicates 88.8 g of cu is present along with 11.2 g oxygen in 100 g of compound whereas the statement ‘2st compound contains 79.9 % cu ’ indicates 79.9 g of cu is present along with 20.1 g oxygen in 100 g of compound

1st compound contains 88.8 g cu

for cu

m = 63 g /mol

atomic % = 88.8 /63 = 1.42

for o

m = 16 g /mol

atomic % = 11.2 /16 = 0.7

b. the emperical formula of 1st compound is

cu1.4o0.7

cu2o