Purely for crystalline structure, "twinning" or repetition of crystal forms can bring about a striated texture on the mineral. Crystal defects and chemical impurities can alter the physical and electrical properties of a mineral. Some minerals can exist in different crystal forms and exhibit "polymorphism." The range in crystal structure can change the mineral's hardness, strength, solubility, electrical properties, melting points, etc.
The fourth one: Gain of an electron
Mass of the substance (m) = 18.3 g
Initial temperature T1 = 25 C
Final temperature T2 = 45 C
Heat absorbed by the substance (Q) = 1.647*10^2 J
Specific heat = c
Formula:
Q = m*c*ΔT
= m*c*(T2-T1)
c = Q/m*(T2-T1) = 1,647*10^2 J/18.3 g *(45-25)C
c = 0.45 J/g C
The substance with a specific heat capacity of 0.45 J/g C is iron.
Answer:
The answer is Near the Equator.
Explanation:
Its near africa and africa is near the equator.
