Store equal amount of tap water in a glass jar and in a single-use water bottle for 2 weeks in normal room temperature. Test the pH strength of the water in both cases using a pH paper and compare the results and arrive at conclusions.

The pH strength of the single-use water bottle is that it should remain the same if it came from clean water. Both cases should be the same as long as it has the equal amount of water with the same temperature.

Explanation:

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the density of gold = 19.3 g/cm3

the relation between density and mass and volume is

density = mass / volume

given :

mass of gold = 13 g

density = 13g / volume = 19.3

volume = 13 /19.3 = 0.67 cm^3

thus volume of gold nugget = 0.67 cm^3