chemistry

Follow the steps provided in the simulation to add water to the graduated cylinder, select one of the three samples (copper, silver, or gold), set its mass to the values given in the statements below, find its volume, and calculate its density.

To save time, you can approximate the initial mass of the solid to the nearest \pm\! 1~\rm g. For example, if you are asked to add 14.3 \rm g of copper, add between 13 \rm g and 15 \rm g.
Which of the following sets include two samples with an equal density?
Check all that apply.

20.2 \rm g silver and 20.2 \rm g copper
15.2 \rm g copper and 50.0 \rm g copper
15.4 \rm g gold and 18.7 \rm g silver
11.2 \rm g gold and 14.9 \rm g gold

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  1. Cu goes with Cu as the same density.
    Au goes with Au as the same density. Other than that I have no idea what a 20.2\rm g means.

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  2. 15.2 \rm g copper and 50.0 \rm g copper
    11.2 \rm g gold and 14.9 \rm g gold

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  3. 15.4 \rm g gold and 18.7 \rm g silver

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    posted by herry
  4. QRC

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    posted by SUPU
  5. You add 8.6 g of iron to 28.40 mL of water and observe that the volume of iron and water together is 29.49 mL . Calculate the density of iron.

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