Chemistry review matter and lab equipment

The temperature of a sample of water changes from 10C to 20C when the sample absorbs to 418 J of heat. What is the mass of the sample? A) 1g B)10g C)100g D) 1000g

10g

How much heat energy must be absorbed to completely melt 35.0 grams of h2o(S) at 0C? A)9.54J B)79,100J C)146J D)11,700J

11,700J

An 80.0 gram sample of water at 10.0c absorbs 1680 joules of heat energy. What is the final temperature of the water? A)4.00c B)5.00c C)15.0c D) 50.0 c

15.0c

The temperature of 100 grams of water changes from 16.0 C to 20.0C. What is the total number of Joules of heat energy absorbed by the water? A)168 B) 420. C)105 D)1680

1680

A 36-gram sample of water has an initial temperature of 22C. After the sample absorbs 1200 J of heat energy, the final temperature of the sample is A) 14C B)55C C)8.0C D)30C

30C

Which substance has vibrating particles in regular, fixed positions? A)Ca(s) B) Hg(l) C)Cl2 (g) D) CaCL2 (aq)

A

Mayer that is composed of two or more different elements chemically combined in a fixed proportion is classified as

A compound

Which type of matter is composed of two or more different elements that are chemically combined into a definite ratio?

A compound

Which set of procedures and observations indicates a chemical change?

A cool, shiny metal is added to water in a beaker and rapid bubbling occurs

Which terms are used to identify pure substances

An element and a compound

Which 5.0-milliliter sample of NH3 will take the shape of and completely fill a closed 100.0- milliliter container? A) NH3(s) B) NH3(l) C) NH3(g) NH3(aq)

C

Which samples are substances? A)HCL (aq) B)NaCL (aq) C) HCL (g) D) NaCL(s)

C and D

Which process is exothermic? A)sublimation of ice B) melting of copper c)condensation of ethanol vapor C) boiling of water

Condensation of ethanol vapor

An example of a psychical property of an element is the elements ability to

Form an aqueous solution

A large sample of solid calcium sulfate is crushed into smaller pieces for testing. Which two psychical properties are the same for both the large sample and one of the smaller pieces?

Solubility and density

Which statement correctly describes a sample of gas confined in a sealed container?

It takes rhe shape and the volume of any contisner in which it is confined

Which physical changes are endothermic? A) condensation and deposition B) melting and freezing C) condensation and sublimation D) melting and evaporating

Melting and evaporating

Two basic properties of the gas phase are

No definite shape and no definite volume

The heat of fusion of a substance is the energy measured during a A) temperature change B) phase change C) pressure change D) chemical change

Phase change

A gas changes directly to a solid during A) saponification B) deposition C) fusion D) decomposition

deposition

The heat energy required to change a unit mass of a solid into a liquid at a constant temperature is called A) heat of fusion B) heat of vaporization C) heat of solution D) heat of formation

heat of fusion