What is the scientific method and how does it work?

What method(s) do plants use to obtain nitrogen? select all that apply. absorb it from the atmosphere use bacteria to convert nitrogen to usable form obtain usable nitrogen compounds from the soil absorb nitrogen from water taken in at the roots

What is the mass of 0.46 mil of mgcl2

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