Why is it important to repeat the steps or an experiment multiple time

There are six characteristics a substance must display in order to be classified as a mineral. explain those six characteristics.

What element is this? How do you know?

During which method of separation is one of the components of the mixture lost? A) Distillation B) Magnetic Separation C) Screening D) Evaporation

Can a physical change actually change what a substance is?

The electromagnetic spectrum includes the complete range of electromagnetic waves placed in order of: A.) increasing amplitude B.) increasing frequency C.) increasing wavelength D.) decreasing frequency?

Does a gas discharge tube filled with boron emit the same wavelength

a certain solution has a molarity of m = 6.39 mol/l and has a volume of v = 0.550 l what is the value of n

Alcohols are polar molecules. true false

If a normal force of 500 N is acting on two surfaces in contact with a coefficient of friction equal to 0.50, what would be the maximum force of static friction?

Elements with the same number of shells are called? All the element that have the same number of valence electrons and have similar physical and che. ical properties are called?