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

A solution is 0.0460 m nabr. what is the molarity of the solution if the density is 1.10 g/ml?

What makes the atomic radius change down a column of the periodic table? O A. The greater number of total electrons, the larger the atomic radius. O B. The more valence electrons listed, the larger the atomic radius. C.

Which type of reaction occurs in the following? 2HgO (s) - - 2Hg (l) + O2 (g) 1. a decomposition reaction in which a metal is reduced 2. an acid-base neutralization reaction to produce oxygen gas a displacement 3.

Are all atoms (elements) neutral? And if not, how is the amount of electrons discovered?

A piston contains 5.00 L of gas at a pressure of 101 kPa. The piston is compressed until the gas occupies 2.00 L of space. What is the new pressure of gas inside the piston?

Reaction rate lab report

The absence of which cell structure would indicate a cell is prokaryotic?

When 0.880 g of an organic compound containing carbon, hydrogen and oxygen is burned completely in oxygen, 1.760 g of co2 and 0.720 g h2 o are produced. what is the empirical formula of the compound?

In ammonium chloride salt (nh4cl) the anion is a single chloride ion, cl. what is the cation of nh4cl

What does copper II sulfate do to the enzyme activity?