Atoms and Moles
How many grams in 6.022 x 10^23 atoms C?
12.01 g C
What is the percent composition of fluorine is in chromium (III) fluoride?
47.7%
How many moles in 2.65 g Fe?
0.0474 mol Fe
What is the empirical formula of C6H6
CH
What is the molecular formula of a compound that has an empirical formula of NO2 and a molar mass of 138 g/mol.
N3O6
How many atoms in 6.755 mol Pb?
4.068 x 10^23 atoms Pb
What is the percent composition of potassium in potassium cyanide?
60.0%
How many grams in 6.50 moles Cu
413 g Cu
What is the empirical formula of a compound that has 25.9% nitrogen and 74.1 % oxygen.
N2O5
A compound is 92.2 % Carbon, 7.76 % Hydrogen. The formula mass is 78.1 g/mol. What is the molecular
C6H6
What is the percent composition of oxygen in magnesium nitrate
65%
Find the mass of 1.00 X1023 molecules of nitrogen gas
4.65 grams
a certain blue solid contains 36.84 % N and the rest oxygen. What is the empirical formula?
N2O3
molar mass of nicotine is 162.1 g/mol. It contains 74.0% C, 8.7% H, and 17.3 % N. Determine nicotines molecular
C10H14N2
How many atoms in 0.250 mol SO3?
6.04 x 10^23 atoms SO3
What is the percent composition hydrogen in ammonium sulfide
How many grams in 4.50 x 10^12 atoms aluminum oxide?
1.52 x 10^-10 g
an experiment uses a catlayst that is 23.3 % Co, 25.3 %Mo, and 51.4% Cl. What is the empirical formula?
Co3Mo2Cl11
a compound contains 26.35 % carbon, 3.30 % hydrogen, and 70.35 % O. The molecular mass is 819 g/mol. What is the molecular formula.?
C18H27O36
How many atoms in 0.02550 g lead (IV) oxide?
1.699 x 1020atoms
What is the percent composition of sulfur and oxygen in aluminum sulfate
s: 28
O 56%
How many grams in 8.420 x 1024 atoms Bromine?
1117 g Br
Magnesium was heated with oxygen. The magnesium weighed 0.060 grams before it was heated and 0. 080 grams after it was heated. What is the empirical formula?
A compound contains 64.3% carbon, 7.14% hydrogen and 28.6% oxygen. The compound has a molecular mass of 448 g/mol. What is the molecular formula?
C24H32O8