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a student is completing a lab investigation. the procedure is below. procedure:1. using a graduated cylinder, measure out 50 ml water (h2o) and pour it in a 100 ml beaker2. using a balance, measure out 5 g of glucose (c6h12o6) 3. pour the 5 g of glucose into the 50 ml of water4. stir the contents of the beaker using a glass rod5. using tweezers, count out 15 pieces of iron (fe) filings6. add the iron filings to the beaker7. stir the contents of the beaker using a glass rod during which step(s) was the student handling a pure substance?

Respuesta :

The student handling a pure substance in the first step that is pouring the H₂O. glucose is also a pure substance but glucose solution is not a pure.

The H₂O , water is a pure substance. glucose is also a pure substance but glucose solution is not a pure. glucose solution is a homogeneous mixture.

Thus, a student is completing a lab investigation. the procedure is below. procedure:1. using a graduated cylinder, measure out 50 ml water (H₂O) and pour it in a 100 ml beaker2. using a balance, measure out 5 g of glucose 3. pour the 5 g of glucose into the 50 ml of water4. stir the contents of the beaker using a glass rod5. using tweezers, count out 15 pieces of iron (Fe) filings6. add the iron filings to the beaker7. stir the contents of the beaker using a glass rod  .The student handling a pure substance in the first step that is pouring the H₂O.

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