CHEM FINAL EXAM - Test 1 review

How many protons and electrons, respectively, can be found in the atoms of the following element, according to the provided information. Only enter the numerical answer. Enter the number of protons first followed by the number of electrons separated by a coma. For example if your answer is 1 proton and 2 electrons, enter your answer as 1,2 (wit no space) S2−

16,18

Determine the volume, in mL, of an object that has a mass of 455.6 g and a density of 19.3 g/cm3. Report your answer with three (3) significant figures. Do not include the units with your answer. Just the magnitude (the number)

23.6

Select the answer that expresses the result of this calculation with the correct number of significant figures and units 15.914 cm + 248.10 cm - 12.004604 cm 2A) 52.009 cm B) 252.01 cm C) 252.0094 cm D) 252.0 cm E) 252 cm

252.01 cm

Atoms that have the same number of protons but different number of neutrons. Therefore, different mass numbers.

Isotopes

No matter what its source, a particular compound is compound of the same elements in the same parts by mass

Law of definite composition

The total mass of substances does not change during a chemical reaction.

Law of mass conservation

Aspartame is an artificial sweetener that is 160 times sweater than sucrose (table sugar) when dissolved in water. The molecular formula of Aspartame is C14H18N2O5{"version":"1.1","math":"<math xmlns="http://www.w3.org/1998/Math/MathML"><msub><mi>C</mi><mn>14</mn></msub><msub><mi>H</mi><mn>18</mn></msub><msub><mi>N</mi><mn>2</mn></msub><msub><mi>O</mi><mn>5</mn></msub></math>"}. Using the periodic table, calculate the molecular mass of Aspartame. Report your answer with four (4) significant figures. Do not forget to include the units with your answer.

294.3 amu

How many protons and electrons, respectively, can be found in the atoms of the following element, according to the provided information. Only enter the numerical answer. Enter the number of protons first followed by the number of electrons separated by a coma. For example if your answer is 1 proton and 2 electrons, enter your answer as 1,2 (wit no space) Ag+

47,46

How many significant figures are in the measurement, 20.3000 m?

6

How many protons and neutrons, respectively, can be found in the nucleus of following element, according to the provided information below. Only enter the numerical answer. Enter the number of protons first followed by the number of neutrons separated by a coma. For example if your answer is 1 proton and 2 neutrons, enter your answer as 1,2 (with no space) 15 7 N

7,8

How many protons and neutrons, respectively, can be found in the nucleus of following element, according to the provided information below. Only enter the numerical answer. Enter the number of protons first followed by the number of neutrons separated by a coma. For example if your answer is 1 proton and 2 neutrons, enter your answer as 1,2 (with no space) Au-197

79,118

Which of the following represent isotopes of the same element? A: 79 34X B: 79 35X C: 78 34X D: 81 36X C and D B and D A and D A and C

A and C

Consist of two or more different elements that are bonded chemically.

A chemical compound

Consist of two or more substances that are physically intermingled, and not chemically combined

A mixture

Has no charge

A neutron

Has a positive charge

A proton

The fuel tank capacity of my old Jeep Cherokee is 59.8 L. Venezuelan people pay an absurdly low price for gas. The average price for a gallon of regular gas on February 6, 2015 was just four (4) U.S. cents. How much U.S. dollars does it cost to fill the fuel tank of this car in Venezuela? (3.79 L = 1 gal). A) $ 6.3 x 10-1 B) $ 6.3 x 101 C) $ 6.3 x 10-2 D) $ 6.3

A) $ 6.3 x 10-1

The distance from Caracas, Venezuela to Waco, TX is about 154.0 Megainches approximately. Calculate the distance between those two cities in Km. (2.54 cm = 1in; 100 cm = 1 m) (1 Mega = 1,000,000) (1 km = 1000 m) A) 3.912x10^3 km B) 3912000 k C) 39120 km D) 3.912x10^-3 km

A) 3.912x10^3 km

Which of the following is an example of intensive properties? A) Boiling point B) Height C) Volume D) None of the options is an example of intensive properties E) All options are examples of intensive properties

A) Boiling point

In which of the following sets do all species have the same number of protons? A) Br, Br-, Br+ B) F-, Ne, Mg2+ C) K+, Rb+, Cs+ D) Ge, Se2-, Br-

A) Br, Br-, Br+

If the walls in a room are 1055 square feet in area, and a gallon of paint covers 15 square yards, how many gallons of paint are needed for the room? (3 ft = 1 yd) A) 2.3 gallons B) 7.8 gallons C) 47 gallons D) 7.4 gallons E) 21 gallons

B) 7.8 gallons

Which of the following statements about the nuclear theory of atoms is false? A) Most of an atom's mass and all its negative charge are contained is a small core B) Most of the volume of the atom is empty space, through which electrons are dispersed C) Atoms are electronically neutral D) 6dsaAll of above statements are true E) All of the above statements are false

A) Most of an atom's mass and all its negative charge are contained is a small core

A chemical change occurs: A) When methane gas is burned B) When paper is shredded C) When salt is dissolved in water D) Water is vaporized E) When powdered lemonade is stirred into water

A) When methane gas is burned

Has a negative charge

An electron

Is the simplest type of matter with unique physical and chemical properties

An element

Which of the following statements about the phases of matter is TRUE? A) mixtures of two or more pure substances. B) two or more atoms chemically joined together C) homogeneous mixtures D) mixtures of two or more elements that has a specific ratio between components. E) heterogeneous mixtures

B) two or more atoms chemically joined together

Michael Duane Johnson, a former Baylor student (Go Bears!), is a retired American sprinter. He won 4 Olympic gold medals as well as eight World Championship gold medals. On July, 1996, Johnson easily captured the 400 m Olympic title with an Olympic record time of 43.49 seconds. Calculate his speed in miles/hours. (1 mi = 1609.3 m ; 1 h = 3600 s) A) 12.1 mi/h B) 9.20 mi/h C) 20.6 mi/h D) 36.5 mi/h

C) 20.6 mi/h

Identify the longest length. (1 in = 2.54 cm; 1 ft = 30.48 cm; 100 cm = 1 m; 1 yd = 91.44 cm) A) 3.10 ft B) 91.44 cm C) 37.0 in D) 1.00 m E) 1.02 yd

D) 1.00 m

Which of the following statements about energy is FALSE? A) The total energy of a system remains constant. B) Systems tend to change in order to lower their potential energy. C) Energy is the capacity to do work. D) Kinetic energy is the energy associated with its position or composition. E) Energy can be converted from one type to another.

D) Kinetic energy is the energy associated with its position or composition

Choose the pure substance from the list below. A) Salt water B) A Casserole C) Apple juice D) Coffee E) Water

E) Water

Is the total number of protons and nucleus of an atom

Mass number

Equals the number of protons in the nucleus of its atoms.

The atomic number of a element