3. Chemical Reactions
Empirical Formula
3. Chemical Reactions
Empirical Formula - Video Tutorials & Practice Problems
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The empirical formula gives the relative number of atoms.
1
concept
Empirical Formula
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2
example
Empirical Formula
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3
Problem
ProblemDetermine the simplest form of a compound made up of carbon, hydrogen, nitrogen and oxygen if it is made of 49.48% C, 5.19% H and 16.48% O.
A
C4H12NO2
B
C4H5N2O
C
C2H4NO7
D
CHN3O5
4
Problem
ProblemA chemist wishing to identify a compound determines the masses of its elements as: 1.445 g S and 6.391 g Cl. Determine its empirical formula.
A
SCl
B
S2Cl8
C
SCl4
D
SCl6
5
Problem
ProblemA compound composed of potassium, manganese and oxygen contains 3.12 g potassium and 1.922 x 1023 oxygen atoms. If a sample of the compound weighs 12.61 g determine its empirical formula?
A
KMnO4
B
KMnO2
C
Mn2O9
D
K2M4O2
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PRACTICE PROBLEMS AND ACTIVITIES (99)
- The following diagram represents the collection of elements formed by a decomposition reaction. (b) Could you...
- The following diagram represents the collection of elements formed by a decomposition reaction. (a) If the blu...
- The following diagram represents the collection of CO2 and H2O molecules formed by complete combustion of a h...
- Dimethylhydrazine, a colorless liquid used as a rocket fuel, is 40.0% C, 13.3% H, and 46.7% N. What is the emp...
- Give the empirical formula of each of the following compounds if a sample contains (c) 26.56% K, 35.41% Cr, a...
- Give the empirical formula of each of the following compounds if a sample contains (b) 2.10 g nickel and 0.58 ...
- Give the empirical formula of each of the following compounds if a sample contains (a) 0.052 mol C, 0.103 mol ...
- The structural formulas of the compounds n-butane and isobutane are shown below. (c) Which formulas—empirical...
- The structural formulas of the compounds n-butane and isobutane are shown below. (b) Determine the empirical ...
- Determine the empirical formula of each of the following compounds if a sample contains (c) 89.14% Au and 10....
- Determine the empirical formula of each of the following compounds if a sample contains (b) 12.0 g calcium and...
- Determine the empirical formula of each of the following compounds if a sample contains (a) 3.92 mol C, 5.99 ...
- Determine the empirical formulas of the compounds with the following compositions by mass: (b) 57.5% Na, 40.0%...
- Determine the empirical formulas of the compounds with the following compositions by mass: (a) 74.0% C, 8.7% H...
- What are the molecular and empirical formulas for each of the following compounds? Write the molecular formula...
- Determine the empirical formulas of the compounds with the following compositions by mass: (c) 60.0% C, 4.4%...
- Determine the empirical formulas of the compounds with the following compositions by mass: (a) 42.1% Na, 18.9%...
- Two substances have the same molecular and empirical formulas. Does this mean that they must be the same compo...
- Write the empirical formula corresponding to each of the following molecular formulas: (e) C6H4Cl2
- Write the empirical formula corresponding to each of the following molecular formulas: (c) C4H8O2
- Write the empirical formula corresponding to each of the following molecular formulas: (b) C8H10
- Write the empirical formula corresponding to each of the following molecular formulas: (a) Al2Br6
- Determine the molecular and empirical formulas of the following: (b) the compound silicon tetrachloride, whi...
- Determine the molecular and empirical formulas of the following: (a) the organic solvent benzene, which has si...
- Silver metal reacts with chlorine (Cl2) to yield silver chlo-ride. If 2.00 g of Ag reacts with 0.657 g of Cl2,...
- What are the empirical formulas of substances with the following mass percent compositions? (c) Sodium thiosu...
- What are the empirical formulas of substances with the following mass percent compositions? (b) Ilmenite (a t...
- What are the empirical formulas of substances with the following mass percent compositions? (a) Aspirin: 4.48%...
- A chemist decomposes samples of several compounds; the masses of their constituent elements are listed. Calcul...
- A chemist decomposes samples of several compounds; the masses of their constituent elements are listed. Calcul...
- A chemist decomposes samples of several compounds; the masses of their constituent elements are listed. Calcul...
- Ferrocene, a substance proposed for use as a gasoline additive, has the percent composition 5.42% H, 64.56% C,...
- Calculate the empirical formula for each stimulant based on its elemental mass percent composition. a. nicotin...
- Calculate the empirical formula for each natural flavor based on its elemental mass percent composition. b. va...
- What is the empirical formula of stannous fluoride, the first fluoride compound added to toothpaste to protect...
- Calculate the empirical formula for each natural flavor based on its elemental mass percent composition. a. me...
- What are the empirical formulas of each of the following substances? (c) Zircon, a mineral from which cubic zi...
- What are the empirical formulas of each of the following substances? (b) Magnetite, a naturally occurring magn...
- What are the empirical formulas of each of the following substances? (a) Ibuprofen, a headache remedy: 75.69% ...
- The elemental mass percent composition of ibuprofen (a nonsteroidal anti-inflammatory drug [NSAID]) is 75.69% ...
- The elemental mass percent composition of ascorbic acid (vitamin C) is 40.92% C, 4.58% H, and 54.50% O. Determ...
- A 45.2-mg sample of phosphorus reacts with selenium to form 131.6 mg of the selenide. Determine the empirical ...
- Combustion analysis of a hydrocarbon produces 33.01 g CO2 and 13.51 g H2O. Calculate the empirical formula of ...
- Combustion analysis of a 31.472 mg sample of the widely used flame retardant Decabrom gave 1.444 mg of CO2. Is...
- Heating elemental cesium and platinum together for two days at 973 K gives a dark red ionic compound that is 5...
- Under special conditions, sulfur reacts with anhydrous liquid ammonia to form a binary compound of sulfur and ...
- A copper wire having a mass of 2.196 g was allowed to react with an excess of sulfur. The excess sulfur was th...
- An herbicide is found to contain only C, H, N, and Cl. The complete combustion of a 100.0-mg sample of the h...
- Reaction of gaseous fluorine with compound X yields a sin- gle product Y, whose mass percent composition is 61...
- What is the empirical formula of a compound that contains only iron and oxygen and is 22.27% oxygen?
- In general, what does a subscript (such as the "2" in H2) tell you about the molecule?
- How many atoms of oxygen are in the chemical formula 2Ca(ClO2)2?
- Some of the formulas below could be either molecular or empirical formulas; however, some could only be molecu...
- Which of the following is an empirical formula?
- A 4.08 g sample of a compound of nitrogen and oxygen contains 3.01 g of oxygen. What is the empirical formula?
- What is the empirical formula of a compound that contains 75% Ag and 25% Cl by mass?
- Determine the empirical formula for a compound that is 36.86% N and 63.14% O by mass.
- Calculate the empirical formula for each compound
- What is the empirical formula of a compound that contains 85 Ag and 15 F by mass?
- Which pair consists of a molecular formula and its corresponding empirical formula?
- What is the simplest whole-number ratio of atoms in a molecule or formula unit called?
- Determine the empirical formula for a compound that contains C, H and O. It contains 52.14% C and 34.73% O by ...
- What is the empirical formula for a compound if a sample contains 1.0 g of S and 1.5 g of O?
- A molecule of a certain compound contains two nitrogen atoms and four oxygen atoms. What is the molecular form...
- What is the empirical formula for Hg2(NO3)2?
- A chemist decomposes samples of several compounds; the masses of their constituent elements are listed. calcul...
- A molecule is found to contain 47.35 by mass c
- Based on the mole ratio you determined in part c, what is the empirical formula of this compound?
- A sample of an iron-containing compound is 22.0% iron, 50.2% oxygen, and 27.8% chlorine by mass.
- A molecule's molecular formula and its empirical formula always share the same chemical properties
- Which of the following could only be a molecular formula?
- Which of the following statements about empirical formulas is incorrect?
- Which statement is true about an empirical formula?
- Which of the following is already in its empirical formula?
- A substance has a molecular formula of c8h10n4o2. the empirical formula is -
- Which of these is an empirical formula
- What are the subscripts in the empirical formula of this compound?
- Which formula is both a molecule and an empirical formula
- What is the empirical formula of a compound composed of
- The lowest whole number ratio of the elements in a compound is called
- What is the empirical formula for the gas formed?
- An example of an empirical formula is
- Which of the following is an empirical formula
- Determine the empirical formula for a compound that contains C, H and O. It contains 52.14% C and 34.73% O by ...
- Determine the empirical formula for a compound that is 36.86% N and 63.14% O by mass.
- The elemental mass percent composition of succinic acid is 40.68% C, 5.12% H, and 54.19% O.
- What is the empirical formula of a compound that contains 27.0% S, 13.4% O, and 59.6% Cl by mass?
- The lowest whole-number ratio of the elements in a compound is called the
- A compound consists of 37.51 g C, 4.20 g H, and 58.29 g O. What is the empirical formula?
- To indicate the number of atoms of each element present in a molecular compound, scientists use -
- What is the empirical formula for a compound if a sample contains 3.72 g of P and 21.28 g of Cl?
- In [Cu(NH3)4]2+, the subscript 4 indicates which of the following?
- What is the empirical formula of a compound that is 40% sulfur and 60% oxygen by weight?
- Which number indicates the number of atoms of each element in a molecule of a substance
- The elemental mass percent composition of malonic acid is 34.63% C, 3.87% H, and 61.50% O.
- What is the empirical formula of a compound that is 40% sulfur and 60% oxygen by weight?
- Use subscripts to represent the number of each type of atom or ion in a molecule.
- What is the empirical formula of a compound that contains 29% Na, 41% S, and 30% O by mass?
- What is the empirical formula for a compound that is 43.6% phosphorus and 56.4% oxygen?