A molecular compound contains 92.3% carbon and 7.7% hydrogen by
mass. What is the empirical formula of this compound? If 0.592 mol
of the compound weighs 30.78g, what is its molecular formula?
Calculate the percent composition and determine the molecular
formula and the empirical formula for the nitrogen-oxygen compound
that results when 12.04 g of nitrogen is reacted with enough oxygen
to produce 39.54 g of product. The molar mass of the product is
92.02 g. Proper significant figures when needed.
Percent Oxygen:
Percent Nitrogen:
Empirical Formula:
Molecular Formula:
1. A compound with a molecular weight of 222 g/mole contains
only carbon, hydrogen, and oxygen. When 4.33 mg of this compound
was completely combusted in excess oxygen, the products were 9.44
mg of CO2 and 1.75 mg of H2O.
What is the molecular formula of this
compound?
2,
Consider this reaction: 2 C2H2 + 5 O2 ? 4 CO2
+ 2 H2O
If 222 grams of C2H2 reacts completely in this reaction:
What mass of O2 will be required?...
An unidentified covalent molecular compound contains only
carbon, hydrogen, and oxygen. When 5.00 mg of this compound is
burned, 11.61 mg of CO2 and 1.27 mg of H2O are produced. The
freezing point of camphor is lowered by 34.4°C when 4.705 g of the
compound is dissolved in 19.25 g of camphor (Kf = 40.0°C kg/mol).
What is the molecular formula of the unidentified compound? Choose
appropriate coefficients in the molecular formula below.
C H O
An unidentified covalent molecular compound contains only
carbon, hydrogen, and oxygen. When 7.40 mg of this compound is
burned, 21.98 mg of CO2 and 3.00 mg of H2O
are produced. The freezing point of camphor is lowered by 10.4
Determine the empirical formula for each compound from the
molecular formula.
molecular formula=C3H6 empirical formula=
molecular formula=C6H12O6 empirical formula=
A
compound containing only carbon and hydrogen is found to have an
empirical formula with molar mass of 13. 0 g/mol. The
compound
1.
cannot be either C2H2
or C6H6
2.
could be C6H6
but no C2H2
3.
could be C2H2
, but not C6H6
4.
could be C2H2
or C6H6
A
compound containing only carbon and hydrogen is found to have an
empirical formula with molar mass of 13. 0 g/mol. The
compound
1.
cannot be either C2H2
or...
A scientist is studying a monoprotic carboxylic acid that
consists of only carbon, hydrogen, and oxygen. From a titration he
finds that 13.4 mL of a 0.250 M sodium hydroxide solution
are required to neutralize 0.5303 grams of the carboxylic acid.
From a combustion experiment he finds that 2.982 grams of the
carboxylic acid yields 0.9835 grams of carbon dioxide and 4.80
grams of water.
(a).What is the molecular weight of the carboxylic acid?
g/mol
(b.)What is the empirical formula...
A 38.40 mg sample of an organic acid composed of just carbon,
hydrogen, and oxygen was burned in pure oxygen to give 37.54 mg CO2
and 7.684 mg H2O in a combustion analysis. In a separate
experiment, the molecular mass was determined to be 90. In a
titration, 40.2 mg of the acid dissolved in 50 mL of water required
14.28 mL of 0.0625 M NaOH for complete neutralization. Use these
data to draw a reasonable Lewis structure for the...