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15 July, 16:09

A molecular model uses the scale 2.5 cm:0.00001 mm. if the model is 7 cm long, how long is the actual molecule

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  1. 15 July, 16:36
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    The scale indicates that 2.5cm/0.00001mm = 1, and due to the multiplicative identity property, you can multiply anything in an equation by one, so you would do (7cm) (0.00001mm/2.5cm) = 0.000028
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