Why is a solution not a pure substance

By analogy to examples given in the text, predict what gas forms when na2so3 (s) reacts with hcl (aq). express your answer as a chemical formula.

How can I draw the Lewis structure for ClO2-?

What is the most important part of science

When copper is hammered into a sheet what type of change has the matter gone through?

Which is the correct equilibrium constant expression for the following reaction? Fe2O3 (s) + 3H2 (g) - -> 2Fe (s) + 3H2O (g) Kc = [Fe2O3] [H2]3/[Fe]2[H2O] Kc = [Fe]2[H2O]3/[Fe2O3] [H2]3 Kc = [H2]/[H2O] Kc = [H2O]3/[H2]3 Kc = [Fe] [H2O]/[Fe2O3] [H2]

How do you know if the reaction is exothermic or endothermic if both phase are same?

How many elements are in a set whole numbers between 3 and 15

Calculate the percent activity of the radioactive isotope strontium-89 remaining after 5 half-lives.

Describe 2 theories for yawning

When a bimetallic bar made of copper and iron strips is heated, the bar bends toward the iron strip. the reason for this is?