Question

example#2 : mixture of (water )________ and (hydrogen peroxide)______ slide 24: test yourself (mixture, element or compound ?) explain more if you can: a) ______ b) ______ c) ________ slide 25 : what makes them different?(no need to answer) slide 26: study the graphic organizer . why are elements and compounds classified as pure compounds? (hint: what is the basic particle in an element or a compound?)

Explanation:

Water is a compound composed of hydrogen and oxygen atoms in a fixed ratio. Hydrogen peroxide is also a compound made up of hydrogen and oxygen in a different ratio. A mixture of water and hydrogen peroxide is a combination of these two compounds where they are physically combined but not chemically bonded. Elements are substances made up of only one type of atom. Compounds are pure substances composed of two or more different - type atoms chemically bonded together. Pure substances have a definite composition. Elements have atoms as their basic particles and compounds have molecules (groups of atoms bonded together) as their basic particles in most cases.
a) Mixture. It is a physical combination of water and hydrogen - peroxide.
b) Compound (water). It has a fixed chemical formula ($H_2O$) and is made of hydrogen and oxygen atoms chemically bonded.
c) Compound (hydrogen peroxide). It has a fixed chemical formula ($H_2O_2$) and is made of hydrogen and oxygen atoms chemically bonded.

Answer:

a) Mixture
b) Compound
c) Compound