Question

25. Classify the following as element, compound or mixture and explain how do you know?

a) NaCI + H2O
b) C2H4O
c) O2
d) Co
e) CO
f) H2 + O2
g) H2O2

Answer 1

A Mixture

B compound

C element

D element

E. Compound

F mixture

G compound

Step-by-step explanation:

A compound is formed from the chemical reaction between two or more atoms

A Mixture is formed when two or more elements are physically combined

An element is any substance that contains only one kind of an atom

Answer 2

A) Mixture - salt mixed with water
B) Compound - hydrogen, oxygen, carbon together
C) Element - only oxygen
D) Element - only copper
E) Compound - carbon and oxygen together
F) Compound - hydrogen and oxygen together
G) Compound (i think)