2mm=2,000,000 nm
2,000,000/25=80,000
The answer is 80,000 polio viruses
The theory that describes the motion and force driving earth's plates is Plate tectonics
Explanation:
Plate tectonics states that the outer shell of the Earth is divided into plates that glide and move over the mantle which is the surface of the earth.
The mantle is the rocky inner layer above the core of the Earth.
Plate tectonics helped the geologists to explain how continents could move around the planet.
There are 9 major plate tectonics , namely North American, Pacific, Eurasian, Australian, African, Indo - Australian,Indian South American and Antarctic. These plates have been named after the land form found on them.
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Answer: the correct option is A (C.N. = 6; O.N. = +4.)
Explanation:In the coordination
compound[Cr(NH3)(en)2Cl]Br2,
the coordination number (C.N.) and oxidation number (O.N.) of the
metal atom are 6 and +4 respectively.