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<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>
Answer:
C
Explanation:
A hot spot develops above the plume. Magma generated by the hot spot rises through the rigid plates of the lithosphere and produces active volcanoes at the Earth's surface. And as oceanic volcanoes move away from the hot spot, they cool and subside. As a result they produce older islands, atolls, and seamounts.
Cartographers can represent the spherical Earth on flat paper by making a projection which is like casting shadows from the spherical world onto a flat piece
of paper
<u>Explanation</u>:
Cartographers otherwise known as map makers who combine nature and science through an acquired skill called cartography, it could serve as an efficient form of communicative technique for acquiring information through the procession of data.
Cartographers use PROJECTION to represent the spherical earth on a flat paper, through this scientific method, one could say that this structure reshapes reality in the human eye. There are steps or ways in which one can achieve a representation of the spherical earth on flat paper but it can only be foreseen by the complementarity of PROJECTION.
