The answer is going to be C. Although producing at a fast rate, fossil fuel cannot be re-used or recycled. Wind can be re-used, geothermal energy can be re-used, and hydro energy can be re-used.
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Answer:
A. Potassium phosphate: K3PO4
B. Copper (II) sulfate: CuSO4
C. Calcium chloride: CaCl2
D. Titanium dioxide: TiO2
E. Ammonium nitrate: NH4NO3
F. Sodium bisulfate: NaHSO4
Explanation:
All are ionic salts with different valent (mono valent cation or poly valent cation and anions) ions.
Mass number is the sum of protons and neutrons inside an atom.
Atomic mass = no. of protons + no. of neutrons
The m.p. and b.p. of Po, is lower than Te due to
<u>a) inert pair effect</u>
Longer wavelength means frequency is lower, thus pitch is lower
