Which of these is a mixture? Oxygen, air, sugar or common salt

A spider and tick evolved from the same ancestor, the fact that they evolved into different organisms, how can that be explained by?

What property of metals allows them to be shaped into wires?

If a seed crystal was added to a supersaturated solution, how would you characterize the resulting solution?

A chemist dissolves of pure hydroiodic acid in enough water to make up of solution. Calculate the pH of the solution. Be sure your answer has the correct number of significant digits.

Countries that have unequal distribution of resources or few resources tend to have high levels of?

How many moles are in. 12 grams of gold.

When lithium reacts with bromine to form the compound LiBr, each lithium atom: (1) gains one electron and becomes a negativelycharged ion (2) gains three electrons and becomes a negativelycharged ion (3) loses one electron and becomes a

Based on what you know about matter, explain why the food coloring mixes at different rates

What does the variable A stand for in the Arrhenius equation? A. activation energy B. frequency factor C. rate constant D. reactant concentration

Name 3 sets of elements that have been added to the periodic table since mendeleev's time