Please select the word from the list that best fits the definition. “The remains of these form oil and natural gas” A.) nonrenewable resources
B.)Renewable sources
C.) Methane hydrates
D.) Marine organisms
E.)Petroleum
F.)Nonliving resources

i believe you are right for all except the 3rd ( look at sqdancefan his answer is much better)

the ratio of the conjugate base to the acid required to attain the desired ph.

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

they are all solids.