Avogadro's Number
Avogadro's Number
What is 6.022 X 1023
(this is the amount of particles in 1 mole)
The molar mass of sucrose (C12H22O11)
What is 342.34 g/mol.
The percent of Hydrogen in HCl. (2sf)
What is 2.8%
The molecular formula of a compound with the empirical formula C2OH4 and a molar mass of 88 grams per mole.
What is C4O2H8
The mass of 3.52 X 1024 molecules of water.
105 g
The molar mass of uranium hexafluoride. (UF6)
What is 352.03 g.
Calculate the number of moles in 4.5 g sodium chloride
0.077 moles
The percent of potassium in potassium carbonate.
What is 56.6%
K2CO3
Which of these is NOT an empirical formula
A) Mg3(PO4)2
B) C6H12O6
C) SO
B) can reduce to CH2O
The number of atoms in 0.60 moles of Zinc.
3.6 x 1023 atoms
The mass in grams of 8 moles of lead (II) oxide
1786 g PbO
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The Percent composition each element in HCN
What is H: 3.7% C: 44% N: 52%
A compound is found to contain 5.9% Hydrogen and 94.1% Oxygen and a molar mass of 34 g/mol. What are the empirical and molecular formulas of this compound?
HO and H2O2
The number of moles in 3.7 X 1025 molecules of carbon dioxide.
What is 61 moles
The number of moles in 13.5 grams of Oxygen gas
0.422 mol
Remember oxygen is O2
How many atoms are in 98.5 grams of gold.
3.01x1023 atoms
Percent oxygen in aluminum carbonate
61.54%
Al2(CO3)3
A lab is performed to find a compound has a mass consisting of 9.03g of Magnesium which combines completely with 3.48 g of Nitrogen. What is the empirical formula?
Mg3N2
The number of atoms in 12 moles of carbon.
What is 7.2 X 1024 atoms.
A chemist plans to use 435.0 grams of magnesium nitride in a reaction. How many moles of this compound is this?
4.31 moles Mg3N2
This is how many formula units (molecules) are in 100 g of magnesium chloride.
6.33 x 1023 formula units of MgCl2
What percentage of calcium hydroxide is calcium?
54.1%
Ca(OH)2
This is the empirical formula for a compound that has 36.0% C, 4.0% H, 28.0% N and 32.0% O.
What is C3H4N2O2?