"Different materials that can be mixed together to make new materials"

How many moles is 14.5 cm^3 of platinum? the density of platinum is 21.45 g/cm^3.

The human activities in two locations are described below: location a: rampant use of plastic containers location b: excessive use of pesticides and fertilizers which statement is most likely true? location a will have poor air quality because plastic is biodegradable. location a will experience water scarcity because plastic absorbs moisture. the population of honeybees will increase in location b because production of crops will increase. the population of fish in location b will decrease because the water is contaminated.

What is the energy in joules of a mole of photons associated with visible light of wavelength 486 nm?