Pleasant Percent Composition
The percent composition of Carbon in carbon monoxide (CO) (round to the tenths place)
42.9% (or 42.8)
1 mole = ____________ atoms / molecules / particles
6.02 x 1023
(or Avogadro's number)
The ______ ________ is the mass of an element or compound from the Periodic Table, equal to one mole of that element or compound
molar mass
1 mole = ______ liters of a gas at standard temperature and pressure
22.4
What type of formula has the simplest whole number ratios
empirical
27.3% (or 27.2%)
How many atoms of Carbon is 0.45 moles of Carbon? (round to the hundredths place)
2.71 x 1023
1.8 moles of C is how grams
0.15 grams
How many liters is 2.5 moles of helium gas?
56 L
The empirical formula of C2H6O4 is
CH3O2
The percent composition of nitrogen in N2O? (round to the tenths place)
63.7% (or 63.6%)
How many moles of CH4 is 8.5 x 1024 molecules of CH4 (round to the tenths place)
14.1 moles
179.85 g/mol
How many moles is 35 L of hydrogen gas?
1.56 moles
If a compound with an empirical formula of CH2 has a molar mass of 28 g/mole, what is the molecular formula?
C2H4
The percent composition of nitrogen in nitrogen trioxide? (round your answer to the tenths place)
22.6% (or 22.5%)
How many molecules of FeCl2 is 1.50 moles of FeCl2 (round to the hundredths place)
9.03 x 1023 molecules
How many moles is 200 grams of CaCl2?
1.80 moles
How many milliliters if 1.5 moles of oxygen gas?
33600 mL
What is the empirical formula of a compound containing 75% Carbon and 25 % Hydrogen ?
CH4
The percent composition of hydrogen in C2H5OH (round to the tenths place)
13.2 % (or 13.1%)
How many atoms of oxygen are in 3.8 moles of Fe(NO3)2? (round to the hundredths place)
1.37 x 1025 atoms of oxygen
How many grams is 2.5 moles of copper (II) hydroxide?
243.9 grams
How many moles of 250 mL of chlorine gas?
0.011 moles
What is the empirical and molecular formula of a compound with 75% Carbon and 25% hydrogen and a molar mass of 64 g/mol?
Empirical: CH4
Molecular: C4H16