Question 1

The element zinc has two naturally occurring isotopes. The natural abundances and isotopic masses are  
The atomic mass of naturally occurring zinc is

Accepted Answer

A)  112.990 
B)  113.582 
C)  113.904 
D)  114.582 
E)  114.818 
A)  112.990 
B)  113.582 
C)  113.904 
D)  114.582 
E)  114.818 E

Question 2

Which nuclide has more protons than neutrons?

Accepted Answer

A)    
B)    
C)   
D)   
A)    
B)    
C)   
D)   A

Question 3

The element antinomy has two naturally occurring isotopes. The natural abundances and isotopic masses are  
The atomic mass of naturally occurring antinomy is

Accepted Answer

A)  121.760 
B)  121.904 
C)  122.048 
D)  122.904 
E)  124.048 
A)  121.760 
B)  121.904 
C)  122.048 
D)  122.904 
E)  124.048 A

Question 4

Gibbsite is an aluminum ore that is composed of 34.59% Al, 3.88% H, and 61.53% O. How much aluminum can be refined from 248.0 g of Gibbsite?

Accepted Answer

A)  7.09 g 
B)  22.81 g 
C)  45.59 g 
D)  85.78 g 
E)  152.6 g 
A)  7.09 g 
B)  22.81 g 
C)  45.59 g 
D)  85.78 g 
E)  152.6 g

Question 5

Two elements X and Y combine to form two compounds with the following compositions  
If compound 1 has the formula XY3 then a possible formula for compound 2 is

Accepted Answer

A)  XY2 
B)  X2Y5 
C)  XY4 
D)  X2Yl9 
E)  XY5 
A)  XY2 
B)  X2Y5 
C)  XY4 
D)  X2Yl9 
E)  XY5

Question 6

If the density of the nucleus of gold is approximately 1´1015 g cm-3 and solid gold has a density of 19.3 g cm-3 estimate the percentage of the volume of solid gold that is "occupied" by the nucleus?

Accepted Answer

A)  2´10-12 % 
B)  2´10-8 % 
C)  2´10-4 % 
D)  2´10-2 % 
E)  2% 
A)  2´10-12 % 
B)  2´10-8 % 
C)  2´10-4 % 
D)  2´10-2 % 
E)  2%

Question 7

In a strange and alternative universe you repeat Millikan's oil drop experiment and measure the following charges on different oil drops   
Using this give your best estimate for the unit of fundamental charge in this alternative universe

Accepted Answer

A)  1.2´10-17 C 
B)  1.8´10-17 C 
C)  3.6´10-17 C 
D)  9.0´10-17 C 
E)  1.2´10-16 C 
A)  1.2´10-17 C 
B)  1.8´10-17 C 
C)  3.6´10-17 C 
D)  9.0´10-17 C 
E)  1.2´10-16 C

The element zinc has two naturally occurring isotopes. The natural abundances and isotopic masses are The atomic mass of naturally occurring zinc is

Which nuclide has more protons than neutrons?

The element antinomy has two naturally occurring isotopes. The natural abundances and isotopic masses are The atomic mass of naturally occurring antinomy is

Gibbsite is an aluminum ore that is composed of 34.59% Al, 3.88% H, and 61.53% O. How much aluminum can be refined from 248.0 g of Gibbsite?

Two elements X and Y combine to form two compounds with the following compositions If compound 1 has the formula XY₃ then a possible formula for compound 2 is

If the density of the nucleus of gold is approximately 1´10¹⁵ g cm^-³ and solid gold has a density of 19.3 g cm^-³ estimate the percentage of the volume of solid gold that is "occupied" by the nucleus?

In a strange and alternative universe you repeat Millikan's oil drop experiment and measure the following charges on different oil drops Using this give your best estimate for the unit of fundamental charge in this alternative universe

Chemical Formulas, Chemical Equations, and Reaction Yields

Introduction to Quantum Mechanics and Chemical Bonding

Quantum Mechanics, Atomic Structure, Quantum Mechanics and Molecular Structure

Solids, Liquids, Phase Transitions, Gaseous State and Bonding in Organic Molecules

Solutions

Thermodynamic Processes, Thermochemistry, Spontaneous Processes and Thermodynamic Equilibrium

Chemical Equilibrium

Acidûbase Equilibria

Solubility and Precipitation Equilibria

Electrochemistry

Chemical Kinetics

Inorganic Materials, Structure, Bonding in Solids, Molecular Spectroscopy, Photochemistry and Nuclear Chemistry

Filters

Exam 1: The Atom in Modern Chemistry

The element zinc has two naturally occurring isotopes. The natural abundances and isotopic masses are The atomic mass of naturally occurring zinc is

Which nuclide has more protons than neutrons?

The element antinomy has two naturally occurring isotopes. The natural abundances and isotopic masses are The atomic mass of naturally occurring antinomy is

Gibbsite is an aluminum ore that is composed of 34.59% Al, 3.88% H, and 61.53% O. How much aluminum can be refined from 248.0 g of Gibbsite?

Two elements X and Y combine to form two compounds with the following compositions If compound 1 has the formula XY3 then a possible formula for compound 2 is

If the density of the nucleus of gold is approximately 1´1015 g cm-3 and solid gold has a density of 19.3 g cm-3 estimate the percentage of the volume of solid gold that is "occupied" by the nucleus?

In a strange and alternative universe you repeat Millikan's oil drop experiment and measure the following charges on different oil drops Using this give your best estimate for the unit of fundamental charge in this alternative universe

Chemical Formulas, Chemical Equations, and Reaction Yields

Introduction to Quantum Mechanics and Chemical Bonding

Quantum Mechanics, Atomic Structure, Quantum Mechanics and Molecular Structure

Solids, Liquids, Phase Transitions, Gaseous State and Bonding in Organic Molecules

Solutions

Thermodynamic Processes, Thermochemistry, Spontaneous Processes and Thermodynamic Equilibrium

Chemical Equilibrium

Acidûbase Equilibria

Solubility and Precipitation Equilibria

Electrochemistry

Chemical Kinetics

Inorganic Materials, Structure, Bonding in Solids, Molecular Spectroscopy, Photochemistry and Nuclear Chemistry

Filters

Two elements X and Y combine to form two compounds with the following compositions If compound 1 has the formula XY₃ then a possible formula for compound 2 is

If the density of the nucleus of gold is approximately 1´10¹⁵ g cm^-³ and solid gold has a density of 19.3 g cm^-³ estimate the percentage of the volume of solid gold that is "occupied" by the nucleus?