A chemistry teacher has a 560-cm length of magnesium ribbon. For a class experiment, each student requires an 8.5-cm length of the ribbon. How many students may receive the required length?

You have a strong solution of lemonade that you need to dilute before serving. During the dilution which of the following will change? Question 8 options: The number of moles of solute the volume of solvent the Molarity of solvent everything changes.

An ion of oxygen contains eight protons and has a charge of 2-. What must occur for this ion to become a neutral oxygen atom? Group of answer choices It must lose two electrons. It must gain two protons. It must gain two electrons.

14. Apply Concepts Write the correct chemical formula for the compounds formed from each pair of elements a. potassium and sulfur b. calcium and oxygen C. sodium and oxygen d. aluminum and nitrogen

Which is true of weak acids and bases? They partially dissociate in water They dissociate completely in water They are unable to react with water They lose all their properties when in water

How many neutrons and protons does a neutral atom of sodium with an atomic mass number of 23 have? A. 22 neutrons; 11 protons B. 23 neutrons; 11 protons C. 11 neutrons; 11 protons D. 12 neutrons; 11 protons

Which is the most practical argument for the continued funding of space exploration? a) Space exploration will one day show whether life exists on other planets in star systems similar to ours.

33 protons 36 electrons 45 neutrons

The periodic table includes all of the known elements in the world. how are elements arranged on the periodic table?

The pOH of a solution is 13.28. What is the [OH]

If you can choose any animal in the world to be, what animal would you choose. (I'd be a wolf or a dog, mostly a wolf)