If 2.5 mg of salt is used with 50 ml of water to make a saline solution, how much water would be used to use up 1 kg of salt to make up a lot of solution?

The difference between the atomic number of an element and the element’s atomic mass is the number of ions.

The blackbody curve for a star name zeta is shown below. what is the peak wavelength for this star ?

Animals that reproduce sexually either do it through external or internal fertilization. read the following statement and decide if it is true or false. birds reproduce through external reproduction which is because the female will then be able to protect the egg.