What is defined as the basic unit in the metric system that describes a quality?
Answer:
Explanation:
Hope this helps!
Unit ppm stands for parts per million. in terms of mass, ppm is equivalent to mg/kg.
since 1 kg is 10⁻⁶ mg, 1 kg is equivalent to million mg.
therefore mg/kg is also ppm.
there are 1.3 g of Ca ions in 3100 kg
if 3100 kg contains - 1.3 g of Ca
then 1 kg contains - 1.3 g / 3100 kg
then Ca ions - 0.42 x 10⁻³ g/kg
Ca ion concentration - 0.42 mg/kg
therefore Ca ion concentration is 0.42 ppm
The answer<span> is
electromagnetic forces. They can be
produced by electromagnetic fields, electrostatic field, and magnetostatic
field. This force affects everything in the universe because it has an infinite
range just like gravity. The electromagnetic
force is also a result of intermolecular forces between individual atoms and
molecules in matter. </span>