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Concept explainers
(a)
Interpretation:
The molecular formula of butyric acid needs to be determined.
Concept Introduction :
Molecular formula of a compound can be calculated from its structure from total
(b)
Interpretation:
The empirical formula of butyric acid needs to be determined.
Concept Introduction :
The empirical formula is simplest ratio of number of atoms present in the molecule.
(c)
Interpretation:
The mass percent composition of butyric acid needs to be determined.
Concept Introduction :
The mass percent composition means mass percent of each atom present in butyric acid. This can be calculated by taking percent ratio of mass of that
(d)
Interpretation:
The mass of carbon atom in 0.850 g of butyric acid needs to be determined.
Concept Introduction :
The number of moles can be calculated from mass and molar mass as follows:
Here, m is mass and M is molar mass.
(e)
Interpretation:
The mass of butyric acid needs to be calculated if the number of oxygen atom is
Concept Introduction :
In 1 mol of any substance there are
Here, m is mass and M is molar mass.
(f)
Interpretation:
The density of butyric acid is 0.959 g/mL at
Concept Introduction :
The density is related to mass and volume as follows:
Here, m is mass and V is volume.
Also, number of moles can be calculated from mass and molar mass as follows:
Here, m is mass and M is molar mass.
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Chapter 7 Solutions
EBK BASIC CHEMISTRY
- 4.94 Indicate if each of the following statements is true or false: (4.3) a. The neutron has no net charges. b. Most of the mass of an atom is due to the protons and electrons. c. The total charge of the electrons is equal, but opposite, to the charge of the nucleus. d. The proton and the electron have about the same mass. e. The mass number is the number of protons. 4.10arrow_forward(3.5)Which of the following compounds contains the metal ion with roman numeral (II) in its name? O CUCO3 ZnCl₂ O Pb(SO4)2 O Hg₂Cl₂arrow_forward(6.3)The volume of a gas is 0.953 L at 30.0 °C. If the gas is heated to 60.0 °C, what would be the volume of the gas (in L) at this temperature? O 1.05 L O 0.867 L O 1.91 L O 0.477 Larrow_forward
- 6. (3 points) Hydralazine is a drug used to treat heart disease. It is 59.99% carbon, 5.03% hydrogen, and 34.98% nitrogen and has a molecular mass of 160.178 g/mol. What is the molecular formula for hydralazine?arrow_forward(5.5, 5.7 & 5.8) Classify the following reaction. Ba(NO3)2(aq) + K₂SO4(aq) --> O acid-base reaction O gas-forming reaction O decomposition reaction O precipitation reactionarrow_forward28. Completely describe the orbitals found in the fourth energy level. How many electrons can be found in a full fourth energy level? Give an example of an element that has its valence electrons in the fourth energy level. (3.3) K/Uarrow_forward
- 4.121 Complete the following table: (4.3) Namere is ONE O tong of the Element bots he Magnesium Joghe amouse. The Atomic Symbolbo 80 Se 228 F 88 Ra Number of Protons 28 Number of Neutrons 34 14 Number of Electrons Avearrow_forwardHow many different chemical compounds are in the gas phase? 2. 3. 4.arrow_forward(5.8)Which of the following reactions will form a gaseous product? O H₂CO3(aq) + Pb(NO3)2(aq) O NaOH(aq) + HNO3(aq) O None of these O Na₂SO3(aq) + H₂SO4(aq) ◄ Previousarrow_forward
- 8. 9. 10. 4 Fe + 3 0₂ → 2 Fe₂O3 If you have 43 grams of oxygen, how many mols of iron(III) oxide will be formed? If you have 7.5 mol of iron, how many mols of oxygen would be required? If you have 125 g of iron, how many grams of iron(III) oxide will be formed? was per the an de and the red nox 91arrow_forward(9.6) Which of the following is in the correct order of increasing atomic radius? O Cs > S > Si Cs > Si > S OS > Si > Cs O Si > S > Csarrow_forwardConsider three elements with the following abbreviatedelectron configurations: (5.4, 5.5, 5.6)X = [Ar]4s23d5 Y = [Ar]4s23d104p1 Z = [Ar]4s23d104p6a. Identify each element as a metal, nonmetal, or metalloid.b. Which element has the smallest atomic size?c. Which element has the highest ionization energy?d. Which element has a half-filled sublevel?arrow_forward
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