7. (5)What is unique about the inert gases conceming their number of electrons?

Question

7. (5)What is unique about the inert gases conceming their number of electrons? 8. (10)Why does thermal expansion occur and why does it occur? 9. (10)What is density? ensit 10.(10) What is the weight of the ethanol that exactly fills a 200.0 mL container? The density of ethanol is 0.789 g/mL 11.(10) A block of aluminum occupies a volume of 15.0 mL and weighs 40.5 g. What is its density? 12.(10) Find the mass of 250.0 mL of benzene. The density of benzene is 0.8765 g/mL The Formula to calculate specific heat q m ec . T.

Explanation / Answer

10.solution

density = mass / volume

m = d*v

m = (0.789 g/mL) (200.0 mL) = 158 g

11.solution

density d = mass / volume = 40.5 g / 15 mL = 2.70 g/mL

12.solution

m = d*v

m = (0.8765 g/mL) (250.0 mL) = 219.1 g

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