Why do the properties of a pure substance not vary from sample to sample

If you move an object from the base of a mountain to the top of the mountain what happens to its mass and weight

Explain how the following changes would affect the rate of the reaction of 2-bromo-3-methylbutane with methanol: Part A The alkyl halide is changed to 2-chloro-3-methylbutane. The alkyl halide is changed to 2-chloro-3-methylbutane.

Why do we study isotopes?

What is the definition of a solution

Which emits visible light? planet, stars, satelite, or moon

What is silicon used for? -matches -gunpowder -glass -steel can coating

A intramuscular medication is given at 5.00mg/kg of body weight. What is the dose in grams for a 180-lb patient?

Nuclear fusion is the source of energy for stars. Besides hydrogen, which other element is most likely also common in stars?

Since the early 2000s, careers in the field of genetics have grown at a rapid pace. Which of these is a probable cause for this explosion of available and expanding jobs?

How many litres of 0.215 m NaCl contains 4.30 mol of this salt? Assume this solvent is H2O I'm confused on this question because little m is molality but when I looked this up on google, someone solved the problem assuming it was molarity