Which of the following is not a state of matter?

 A) density

B) gas

C) liquid

D) solid 

Which of the following gives the correct numbers of protons, neutrons, and electrons in a neutral atom of

118 50 Sn?

 A) 118 protons, 50 neutrons, 118 electrons

B) 50 protons, 50 neutrons, 50 electrons

C) 50 protons, 68 neutrons, 50 electrons

D) 118 protons, 118 neutrons, 50 electrons

E) 68 protons, 68 neutrons, 50 electrons

C) 50 protons, 68 neutrons, 50 electrons

Which of the following is a characteristic of nonmetals?

A) good conductors of heat

B) malleable

C) shiny

D) low melting points

E) good conductors of electricity

A potato contains 20 g of carbohydrate. If carbohydrate has a caloric value of 4 kcal/g, how many kcal are obtained from the carbohydrate in the potato?

A) 40 kcal

B) 20

kcal

C)80kcal

D) 60 kcal

E) 5 kcal 

For the computation (3.1435 + 37.238)/12.62, which is the correct answer?

A) 3.200

B) 3.1998

C) 3.199

D) 3.2

E) 3.19

A) 3.200

Rutherford determind in his experiment that

A) atoms are solid objects.

B) subatomic particles move randomly arount the atomic core.

C) gold is very dense.

D) the charge of an electron is negative.

E) the atom is mostly empty space.

Significant figures are important because they indicate

A) the number of digits on a calculator.

B) the accuracy of a measurement.

C) the number of measurements.

D) the precision of a measurement.

E) the accuracy of the conversion factor

Which of the following is not a base SI unit?

 A) mol

B) seconds

C) liters

D) meters

E) kilograms

Which of the following is not a chemical?

A) light

B) salt

C) water

D) sugar

E) carbon dioxide

Air is a(n)

 A) compound.

B) heterogeneous mixture.

C) element.

D) homogeneous mixture.

E) None of the above.

Please convert 650. J to cal.

 A) 650 cal.

B) 2720 cal.

C) 155 cal.

D) 2.72 cal.

E) 1550 cal.

The Group 8A(18) elements

 A) are unreactive and are rarely found in combination with other elements.

B) react vigorously with water.

C) are good conductors of electricity.

D) are liquids at room temperature.

E) melt at high temperatures. 

What is the density of a substance with a mass of 45.00 g and a volume of 26.4 mL?

 A) 1.7 g/mL

B) 1.70 g/mL

C) 0.587 g/mL

D) 0.59 g/mL

E) 45.0 g/mL 

According to the Atomic Theory,

 A) atoms of the same element combine to form compounds.

B) a compound can contain different numbers of atoms as long as it has the same kinds of atoms.

C) all matter is made up of tiny particles called electrons.

D) atoms are neither created nor destroyed during a chemical reaction.

E) all atoms are different.

Written in scientific notation, 0.000 004 03 is

 A) 4.03.

B) 4.03 × 10-6.

C) 4.03 × 10-7.

D) 0.403 × 10-5.

E) 4.03 × 106.

A value of 25 °C is a measurement of

 A) volume.

B) temperature.

C) mass.

D) density.

E) distance. 

Which of the following would not be part of a study plan to learn chemistry in CHM100?

 A) work the sample problems

B) form a study group

C) skip your instructor's office hours

D) read the chapter before class

E) study a little every day

Which of the following is the basic unit of mass in the SI?

 A) kilogram

B) milligram

C) microgram

D) pound

E) gram 

The expression ppm "1 part per million" could be accurately represented as

 A) 1/(1 x 109).

B) (1 x 106)/(1 x 109).

C) 1 x 106.

D) 1 x 109.

E) 1/(1 x 106).

Which one of the following, by definition, cannot be a pure substance?

 A) solid gold

B) bronze alloy

C) pure water droplets

D) sugar crystals

E) carbon powder 

Which of the following involves a chemical change?

 A) grinding a piece of iron to iron powder

B) dissolving salt in water

C) iron rusting in air

D) freezing of water into ice

E) mixing sugar and salt together 

 In an atom, the nucleus contains

 A) an equal number of protons and electrons.

B) all the protons and electrons.

C) only protons.

D) only neutrons.

E) all the protons and neutrons.

When a solid is converted directly to a gas, the change of state is called

 A) melting.

B) condensation.

C) boiling.

D) freezing.

E) sublimation.

Which of the following is an example of stored potential energy?

 A) riding an exercise bike

B) cutting pizza

C) a fan blade turning

D) water stored in a reservoir

E) runing

Which element would have physical and chemical properties similar to chlorine?

 A) Br

B) P

C) Ar

D) S

E) O

The energy of motion is referred to as

A) freezing.

B) work.

C) kinetic energy.

D) specific heat.

E) potential energy.

Which state of matter has a definite shape and volume?

 A) gas

B) solid

C) fluid

D) liquid

E) atomic

A doctor's order is 0.125 g of ampicillin. The liquid suspension on hand contains 250 mg/5.0 mL. How many milliliters of the suspension are required?

 A) 0.0025 mL

B) 0.0063 mL

C) 2.5 mL

D) 6.3 mL

E) 3.0 mL 

Which of the following is NOT true for the atoms 13N, 14N, and 15N?

 A) They are isotopes.

B) They all have the same mass number.

C) They all have the same atomic number.

D) They all have 7 electrons.

E) They all have 7 protons.

At this time, elements with an atomic number greater than __________ have not been found in nature.

A) 92

B) 78

C) 87

D) 275

E) 266

What is the correct answer for the calculation of a volume (in mL) with measured numbers 28.58 16 × 8.02 ?

 A) 14 mL

B) 14.3 mL

C) 57 mL

D) 0.223 mL

E) 0.22 mL

How many calories are required to raise the temperature of a 35.0 g sample of iron from 25 °C to 35 °C? Iron has a specific heat of 0.108 cal/g °C.

A) 38 cal

B) 130 cal

C) 1.1 cal

D) 3.8 cal

E) 93 cal 

33) What elements are in hydroxyapatite, Ca5 (PO4)3OH, a compound in human bones and teeth?

A) carbon, phosphorus, oxygen, helium

B) calcium, phosphorus, oxygen, helium

C) carbon, potassium, oxygen, hydrogen

D) calcium, phosphorus, oxygen, hydrogen

E) carbon, potassium, oxygen, helium 

Which of the following is an example of a physical change?

A) burning coal

B) digesting a cheeseburger

C) converting water to hydrogen and oxygen

D) grinding table salt

E) baking a cake 

Which one of the following is a heterogeneous mixture?

A) Kool aid

B) vinegar and oil salad dressing

C) gasoline

D) corn syrup

E) sugar water 

If the temperature is - 55 °C, what is the corresponding temperature on the Kelvin scale?

 A) 273 K

B) 225 K

C) 55 K

D) 328 K

E) 218 K 

Matter is

A) anything that has mass.

B) solely a chemical concept.

C) a form of energy.

D) a segment of space.

E) anything that is used in science. 

Which of the following groups belongs to the alkali metal family?

A) Na, Mg, Ca

B) Ir, Os, Re

C) Ba, Sr, Be

D) Cs, Rb, Li

E) Cu, Ag, Au

A heating curve illustrates

A) what happens to the heat applied as the temperature is increased.

B) what happens to the particles of a substance as it is heated.

C) what a substance looks like as it is heated.

D) the changes in the temperature and physical state of a substance as it is heated.

E) the chemical changes that occur as the substance is heated. 

How many common temperature scales are there?

A) infinite

B) 2

C) 4

D) 1

E) 3

Which of the following is a physical property of both liquids and gases?

A) has a definite volume

B) has strong interactions between its particles

C) has large spaces between molecules

D) has its own shape

E) has randomly arranged particles

There is more traffic between 7 and 8 in the morning because most people start work at 8. Considering the concepts of the Scientific Method this would be a(n)

A) hypothesis.

B) observation.

C) theory.

D) experiment.

E) all the above 

The chemical symbol for iron is:

A) Fs

B) Fe

C) Ir

D) FE

E) In

The density of a solution is 0.847 g/mL. Its specific gravity is

A) 1.2.

B) 0.118.

C) 11.8.

D) 1.18.

E) 0.847

Which of the following is a characteristic of the modern periodic table?

A) A group is a horizontal row on the periodic table.

B) The elements in each group have similar chemical properties.

C) The B groups contain the representative elements.

D) The A groups contain the transition elements.

E) A period is a column on the periodic table.

Which of the following is the smallest unit?

A) gram

B) milligram

C) microgram

D) kilogram

E) decigram 

Consider a neutral atom with 30 protons and 34 neutrons. The atomic number of the element is

A) 30.

B) 32.

C) 34.

D) 64.

E) 94. 

Written in scientific notation, 540 000 is

A) 5.4.

B) 54 × 108.

C) 5.4 × 10-5.

D) 0.54 × 106.

E) 5.4 × 105

A calculator answer of 423.6059 must be rounded off to three significant figures. Which of the following respresents the correct answer?

A) 424

B) 423

C) 423.6

D) 420

E) 423.7 

Identify the metalloid in the following list.

A) sulfur

B) germanium

C) fluorine

D) silver

E) copper