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21 August, 07:17

David's teacher passed out a mineral that was white. When he tried to scratch it, he was able to scratch the mineral with his fingernail. She also told him that this mineral is the softest mineral on Mohs Hardness Scale. Which mineral did David's teacher give him? A) calcite Eliminate B) diamond C) quartz D) talc

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Answers (2)
  1. 21 August, 08:49
    0
    D

    Explanation:

    We can cross out B and C first look because both of them are very hard. A is also stone hard so is not possible. Talc is a clay mineral composed of hydrated magnesium silicate with the chemical formula Mg3Si4O10 (OH) 2. Talc in powdered form, often in combination with corn starch, is widely used as baby powder. So the final answer is D
  2. 21 August, 11:15
    0
    D) Talc

    Explanation:

    Mohs' scale of mineral hardness is named after Friedrich Mohs, a mineralogist. Mohs scale is ordered by hardness, determined by which minerals can scratch other minerals. Rocks are made up of one or more minerals. According to the scale, Talc is the softest: it can be scratched by all other materials.
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