Question 1

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

E

Question 2

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

To find the amount of aluminum, multiply the total mass of Gibbsite (248.0 g) by the percentage of aluminum (34.59%). This gives 248.0 g * 0.3459 = 85.78 g of aluminum.

Question 3

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

E

Question 4

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

The answer of The element antinomy has two naturally occurring...

Question 5

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

The volume of the nucleus is much smaller than the volume of the atom, so the percentage of the volume of solid gold that is "occupied" by the nucleus is very small.

Question 6

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

The answer of In a strange and alternative universe you...

Question 7

Which nuclide has more protons than neutrons?

Accepted Answer

The answer of Which nuclide has more protons than neutrons?
...

Quiz 1: The Atom in Modern Chemistry

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

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?

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

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

Which nuclide has more protons than neutrons?

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?