What is a mole?
How many particles are in a mole?
6.02x1023 atoms/molecules/particles
How can you determine the molar mass of an element?
It is the same value as the atomic mass on the periodic table
One mole of water and one mole of glucose have the same molar mass. True or False?
False.
How many moles of tungsten atoms are in 4.8x1023 atoms of tungsten?
0.80 moles tungsten
2.0 molecules of carbon dioxide have a mass of ____
1.5x10-22 grams CO2
Formula that shows the lowest whole-number ratio of elements in a compound
Empirical formula
One mole of carbon monoxide contains the same number of molecules as one mole of carbon dioxide. True or False?
True.
How many atoms are in 3.5 moles of arsenic atoms?
2.1x1024 atoms As
25.0 grams of KNO3 = ____ formula units
1.49 x 1023 formula units
Who is the mole named after?
Avogadro
Which has a higher molar mass: calcium carbonate or sodium carbonate?
sodium carbonate
One mole of hydrogen has the same mass as one mole of carbon dioxide. True or False?
False
0.0377 moles
What is the empirical formula: C4H10
C2H5
Equation to solve for moles from number of particles
(number of particles) / Avogadro's constant = moles
What is the molar mass of carbon mooxide (CO)?
~28.01 grams
There are more atoms in 12 grams of carbon than in 12 grams of copper. True or False?
True.
Calculate the mass of 3.1 moles of NaCl.
180 g
A sample contains 0.130 g nitrogen and 0.370 g oxygen. Determine empirical formula.
N2O5
mass / molar mass = moles
What is the molar mass of AuCl3
303.6 g/mole
The molar mass of chromium is exactly twice that of the molar mass of magnesium.
False. The molar mass of Cr is 52g/mol and the molar mass of Mg is about 24g/mol.
8.10 x 1022 molecules of K2O = ___ grams
12.7 grams
C6H11NO