What is the molarity of a solution with 130 g CoCl2 in 1/2 L

Why does a plastic bottle that is sealed at a high altitude change it’s shape when taken to lower altitude

When a wire with a current is placed in a magnetic field, electrical energy is transformed into mechanical energy select the best answer from the choices provided t f

Amatch has about 21 milligrams of red phosphorus coating the tip. how many atoms of phosphorus is this?