<span>A method of processing coal to remove contaminants by mixing coal in a solution of potassium permanganate in a selected concentration range, rinsing the coal, mixing the coal in a solution of ammonia hydroxide in a selected concentration range to cause the solution to be brought into contact with the surfaces and pores of the coal, discharging the processed coal from the second reaction vessel, monitoring the process to detect when the concentration of aqueous ammonia in the second reaction vessel has fallen below the selected range, and feeding aqueous ammonia solution with an ammonia concentration in or above the selected range to the second reaction vessel to return the solution to within the selected range.</span>
Doldrums are caused by solar radiation from the sun. Because of this the sunlight beams warms the air and causes it to rise straight up instead of side to side (horizontally).
A thermometer, a barometer, a sling psychrometer, and a rain guage
A newly industrialized nation is a nation that has a new highly developed economy and industry relative to other developed nations.
The correct option is A. Mesoscale convective system of storm is a collection of storms that act as a system. This type of storm can cover a whole state and can last for more than twelve hours. It is the largest type of storm.