a pure substance that can't be broken down into simpler substances by chemical or physical means.

A. chemical

B. atom

C. element

D. mineral

Assume f (x) = -2x+8 and g (x) = 5x. What is the value of (f-g) (2) ?

What is a description of a isotonic for a substance?

How many molecules are there in 24 grams of FeF3?

When the shift occurs in the earth's crust, what does the energy radiates us out as?

What is the difference between elements, compounds and mixtures in terms of particle theory?

A cylinder contains oxygen at a pressure of 10.0 atm and a temperature of 300.0 K. The volume of the cylinder is 10,000 mL. What is the mass of oxygen gas?

4 - explicar as mudanças de estados fisicos da materia 6 - definir e exemplificar: -Ligações iônicas ou eletrovalente -Ligações covalentes ou molecular 7-definir substancias puras e suas clasificações 8-definir e exemplificar misturas homogeneas e

What ion forms when an acid is dissolved in a solution?

Suppose you found a material in which 12.5% of the original radioactive atoms were present. if the half-life is 47 years, how old is the material?

How many neutrons does xenon have?