Unit Test — Unit test Answers

Which substance is important in making plastics?

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

Which solution has the greatest number of hydrogen ions?

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?

Which two compounds are used in batteries?

A student combined equal amounts of two solutions. One solution had a pH of 2 and the other had a pH of 12. Which would most likely be the resulting pH?

Which is a property of every homogeneous mixture?

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?

What else is produced during the replacement reaction of magnesium and hydrochloric acid?Mg + 2HCl H2 + ________

Ciara’s bike has rusted, which means that the iron in the metal changed to rust.

Which jar contains a mixture?

While playing soccer, Carla slides across one of the lines on the field. When she stands up, what base does she dust off?

Which separation procedure is most likely to happen?

Which is a pure substance?

Hamid made this table to organize his notes on the properties of acids and bases.Which property is in the wrong column?