Ice crystallizes in hexagonal lattice. At a given temperature, the density of ice is 0.92 gcm -3. The
volume of unit cell is 1.3 x 10-22 cm". The number of H, Omolecules per unit cell is

plants need sunlight, water, and carbon dioxide to make food. plants use the raw materials of water, nutrients they absorb from soil, and carbon dioxide to make sugars the plant can use. energy from the sun and chlorophyll are also needed.

it would be d. henry moseley

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