Fill in the Blank Question When two atoms share one or more pairs of electrons they are united by a(n) square bond.

Which of the following characteristics or postulates are NOT significant in collision theory? Have energy equalto or greater than the energy required to rearrange the atoms Proper orientation The atoms must be hard spheres None of these options

A sample of ethyl alcohol and a sample of aluminum have the same mass. Which sample absorbs more energy as it is heated from $25^{\circ }C$ to $56^{\circ }C$ $c_{ethanol}=0.58kcal/kg\hat {A}^{\circ }C$ and $c_{aluminum}=0.22kcal/kg\hat {A}^{\circ }C$ aluminum ethyl alcohol

3. Which is not a clue that a chemical change has taken place? boils at $90^{\circ }C$ disappears in acid bubbles in water changes color when heated

Which of the following electron sub-levels has the highest energy electrons? 4s 3d 3p 2d 3s

Equations can be balanced by using the half-reaction method. Which step should be completed immediately after finding the oxidation states of atoms? inserting the coefficients balancing the half reactions identifying the half reactions inspecting the number of atoms

Convert 3.000 grams $(g)$ to milligrams (mg). 30 mg 3,000 mg 300 mg 0.3 mg

What is the name of the compound with the chemical formula $Fe_{2}(SO_{4})_{3}$ Spelling counts. name: __

Sodium forms a cation with net charge of $+1$ . How many sodium ions can bond with carbonate ? View the table to help you answer this question. 2 3 4 1

13. 12 grams of carbon react with 32 grams of oxygen to form exactly 44 grams of carbon dioxide. This is a good example of: A Democritus' theory B Priestley's experiments C the Law of Conservation of Mass D the Law of Multiple Proportions 14. Who first proposed the Law of Definite Proportions? A Empedocles B Proust C Dalton D Priestley

A pharmacist needs to make a 25.0 liter of a 350 M solution of a substance. The stock solution of the substance is 10.5 M. How much stock and water must be mixed? 1.47 liters of stock and 16.67 liters of water 8.33 liters of stock and 16.67 liters of water 1.47 liters of stock and 25.0 liters of water 8.33 liters of stock and 25.0 liters of water