Exam 2: Matter and Energy

Which of the following properties is/are classified as physical? i.The odor of glass cleaning solution ii.The color of chlorine gas iii.The electrical conductivity of copper wire iv.The ability of milk to sour v.A compound does not react with bromine

Identify the product(s)that is/are (a)compound(s)in the equation Zn + CoCl₂ → ZnCl₂ + Co.

The formula of most elements is the same as the symbol of the element.This indicates that the element is stable as a single __(i)__,the smallest unit particle of the element.Other elements exist as stable,distinct,and independent __(ii)__,which are made up of two or more atoms.

Which of the following is not a particulate sample of matter?

Under what condition is the Law of Conservation of Energy not obeyed?

Which state of matter is illustrated below?

Which of the following correctly matches each sample with its classification as macroscopic,microscopic,or particulate? Macroscopic Microscopic Particulate

Which of the following is false?

Which of the following particulate-level picture might be associated with the name "silver"?

Which of the following statements is false?

Identify the reactants and the products in the equation H₂SO₄ + BaCl₂ → BaSO₄ + 2 HCl.

Which of the following does not describe a mixture?

Which of the following substances is/are heterogeneous? i.Gasoline ii.A gold bar iii.A freshly opened can of cola iv.Potato chips v.A bacon strip

Examine the following particulate-level representation. This change might be shown symbolically as which of the following?

Which of the following is a chemical property?

Why do chemists use models of atoms and molecules?

Which is the best definition of the term model,as it is used in chemistry?

Which of the following can be a pure substance? i.Gold ii.Air iii.Homogenized milk iv.Sugar completely dissolved in water v.Ice

When freshly cut sodium metal is exposed to air,the mass of the substance increases.Which of the following is the best explanation for this apparent violation of the Law of Conservation of Mass?

When coasting on a bicycle on a level street,the bicycle will eventually come to a stop.Which of the following is the best explanation for this apparent violation of the Law of Conservation of Energy?