chemistry

1.what is the volume of NaCl in cubic cm and cubic nm if the Length is 0.563 nm?
2. the density of NaCl is 2.17 g/cm. What is the Mass?
3. Each repeating unit is composed of 4 NaCl molecules. What is the Mass of 1 NaCl molecule?

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asked by andi
  1. 1. These are just unit changes? What is the problem you are having?
    2. mass = volume x density. Substitute and solve for mass.
    3. I'm confused; you used molecules in two different ways.

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