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18 August, 03:23

Which material is a mixture?

1. water

2. air

3. methane

4. magnesium

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Answers (2)
  1. 18 August, 03:26
    0
    Water is H2O, meaning that it is bonded together which means it is not a mixture. A mixture is two substances mixed together but not bonded together. Methane is CH4, so again it is bonded together so again it is not a mixture. Magnesium is just an element so there is nothing mixed in it since it is a pure substance. So the answer is Air since it is a mixture of gases.
  2. 18 August, 03:29
    0
    Pure air is a mixture of several gases that are invisible and odorless. Consists of 78% nitrogen, 21% oxygen, and less than 1% of argon, carbon dioxide.
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