Types of Chemical Reactions — Unit test Answers

Nio conducts a science experiment. He puts yeast into a bottle with water and sugar, and then caps the bottle with a balloon. He returns two hours later and notices there are bubbles on the surface of the mixture in the bottle and that the balloon has inflated, but there are no other apparent changes.

What are the coefficients for the reaction _Cl2O5 + _H2O → _HClO3 once it is balanced?

Atoms of iron (Fe) form metallic bonds with other iron atoms. How are the valence electrons of these atoms rearranged to form the bonds?

Which best represents the reaction of calcium and zinc carbonate (ZnCO3) to form calcium carbonate (CaCO3) and zinc?

In the reaction C + O2 → CO2, 18 g of carbon react with oxygen to produce 72 g of carbon dioxide. What mass of oxygen would be needed in the reaction?

Which element is least likely to form chemical bonds?

Which term best describes all atoms in ionic bonds?

What causes an ionic bond to form between sodium and chlorine?

Which statement best describes the difference between endothermic and exothermic reactions?

For the equation BaCl2 + Na2SO4 → BaSO4 + 2NaCl, how many chlorine atoms are on the reactants side and on the products side?

Which type of reaction is Mg + S → MgS?

Fluorine has an atomic number 9. It is in period 2 of the periodic table. The diagram shows the electron dot diagram of a fluorine atom.

Lars is balancing equations with his study group. He is unsure about one equation because each member of the study group came up with a different answer. Which is the proper way to balance the equation Ca(OH)2 + H3PO4 → Ca3(PO4)2 + H2O?

The element sulfur (S) is most likely to form covalent bonds with the element

When balanced, which equation would have the coefficient 3 in front of any of the reactants?