We use a kind of plant growth hormone to regular plant growth. We dissolve 5.0 MG of the solution into 2.0 KG of water. What is the dosage of solution in ppm?

When the earth was formed and cooled, why did nickel and iron end up in the center of the earth while basalt and granite ended up in the outer layers

Which of the following is always a reactant in a combustion reaction? oxygen nitrogen hydrogen carbon

The size (radius) of an oxygen molecule is about 2.0 ×10−10m. make a rough estimate of the pressure at which the finite volume of the molecules should cause noticeable deviations from ideal-gas behavior at ordinary temperatures (t= 300k ). assume that deviatons would be noticeable when volume of the gas per molecule equals the volume of the molecule itself.