Molecular Mass
This is the mass of one mole of iron.
What is . . .
55.85 g
This is the number of atoms in 3 moles of gold.
What is . . .
1.806 x 1024 atoms
From this list, this would be an empirical formula:
N2O4
N4O8
NO2
N3O6
What is . . .
NO2
This is the definition of a molecular formula.
What is . . .
a chemical formula showing the actual ratio of atoms.(It may not be in the lowest ratio)
True or False: Moles do not have eyes.
Moles do have eyes, but they rely more on their senses of smell and touch. Their eyes sense light, but they don't have very strong vision.
This is the mass of one mole of CaCl2
What is . . .
110.98 g
This is the number of moles in 2.7 x 1024 molecules of water.
What is . . .
4.48 moles
Finish the poem:
Percent to mass,
__________ to __________
Divide by small
Multiply 'til whole
What is . . .
mass to mole
If the empirical formula is NO2, but the substance has a molar mass of 92 g/mol, this would be the molecular formula.
What is . . .
N2O4
The value for the mole in chemistry was defined as the number of atoms in 12 grams of this isotope of this element.
Hint: give name-mass number
What is . . .
Carbon-12
This is the molar mass of AlF3
What is . . .
83.98 g
This is the number of moles in 522.3 g of carbon tetrachloride (CCl4).
What is . . .
3.4 moles
After doing the first two steps of the poem, a student knows that there are 1.31 moles of Cr and 1.975 mol of O in a compound. Finish the remaining two steps to determine the empirical formula.
What is . . .
Cr2O3
The empirical formula of a chemical is C5H5N
It has a molar mass of 240 amu.
This is its molecular formula.
What is . . .
C15H15N3
Moles possess a "prepollex" which is an "extra" of this body part.
What is . . .
an extra thumb
This is the molar mass of Ca(NO3)2
What is . . .
164.1 g
This is the number of grams in 9.48 x 1023 atoms of copper.
What is . . .
100.07 g
A compound is 30.4% nitrogen by mass and 69.6% oxygen by mass. This is the empirical formula.
What is . . . NO2
Determine the molecular formula of a compound with an empirical formula of NH2 and a molar mass of 32.06 amu.
What is . . .
N2H4
Joke: This is what you call an avocado that is split into 6.02 x 1023 pieces.
What is . . .
guacamole
This is the molar mass of (NH4)2SO4
What is . . .
132.17 g
These calculations prove which has a greater mass (in grams):
8.46 x 1023 atoms of Mn
or
2.56 mol NaCl
What is . . .
Mass of Mn = 77.2 g
Mass of NaCl =149.6 g
so, 2.56 mol of NaCl has a greater mass.
This is the empirical formula for asbestos.
28.03 % Mg
21.6 % Si
1.16 % H
49.21 % O
What is . . .
Mg3Si2H3O8
Vitamin C contains
40.92% C
4.58% H
54.5% O
The molecular mass is 176 amu. This would be its molecular formula.
What is . . .
C6H8O6
Moles can release blarina toxin. This is what the toxin does to their victims.
What is . . .
paralyzes the prey.
(To keep it alive and fresh to store and eat later.)
One study showed a mealworm could be kept alive for 15 days with the toxin.