How long have people studied chemistry?

A. Since chemicals were discovered

B. Since fire was discovered

C. Since the atom was discovered

D. Since gravity was discovered

How do solutions differ from other mixtures? A. Solutions are heterogeneous mixtures. B. Solutions do not contain more than one element. C. Each component of a solution can be seen clearly. D. One component of a solution dissolves in another.

The first ionization energy of polonium, Po, is 812 kJ/mol. Is the first ionization energy of Lv expected to be greater than, less than, or equal to that of Po? Justify your answer in terms of Coulomb's law.

Will a single replacement occur in A. Aluminum and hydrochloric acid B. Silver and magnesium chloride Explain

What are scientific questions based on

What is the difference in the concentrations of oxygen, water vapour, carbon dioxide in inhaled and exhaled air?

Whats a solution! people

How do compounds affect an atom's stability

You need to make 10 mL of 2 mg/ml solution of protein and you have 25 mg/mL solution. How much protein solution and water do you need to mix in order to make the required solution?

The definition of volume is? a) width*height b) the space occupied by mass c) the space occupied by a liquid d) the mass of liquid required to fill a container

What is the empirical formula of a substance that is 53.5% C, 15.5% H, 31.1% N?