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Answer from: Quest
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
Answer from: Quest
each chemical family is represented as a group or column on the periodic table. based on chemical properties, there are 6 types of chemical families. group 1 represents alkali metals, group 2 represents alkaline earth metals, groups 3 to 12 represent transition metals, groups 13 to 16 represent non-metals and other metals, group 17 represents halogens and group 18 represents noble gases.
Answer from: Quest
4d^55s^1 ( third choice)
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The yearly amounts of carbon emissions from cars in belgium are normally distributed with a mean of 13.9 gigagrams per year and a standard deviation of 5.8 gigagrams per year. find the probability that the amount of carbon emissions from cars in belgium for a randomly selected year are between 11.5 gigagrams and 14.0 gigagrams per year. a. 0.340 b. 0.660 c. 0.167 d. 0.397