Most of the material of the earth's crust is
A) compounded and mixed
B) elemental and mixed
C) compounded and pure
D) elemental and pure
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Q21: Which commonly used structural metal has the
Q26: A p-type semiconductor is one that
A) contains
Q28: Which of the following metals is reduced
Q28: To produce steel in the blast furnace,
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A) iron
B)
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A) are solids like tar and
Q34: Glass is annealed so that
A) silicon is
Q35: Which of the following is not an
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