
Concept explainers
(a)
Interpretation:
The fraction of volume in a helium atom occupied by the nucleus is to be determined.
Concept introduction:
Atom is a neutral particle. The presence of an equal number of protons and neutrons make atom a neutral species. Protons are positively charged particles that along with the neutral particles neutrons, make up the nucleus of an atom. The nucleus of an atom is densely packed and occupies a very small volume in the atom at the center. Electrons are negatively charged particles that revolve around the atomic nucleus due to the electrostatic force of attraction between the protons and the electrons.
The formula to calculate the volume of the spherical helium atom is,
The formula to calculate the volume of the spherical nucleus is,
The formula to calculate the fraction of the volume of atom occupied by the nucleus is,
(b)
Interpretation:
The fraction of the
Concept introduction:
Atom is a neutral particle. The presence of an equal number of protons and neutrons make atom a neutral species. Protons are positively charged particles that along with the neutral particles neutrons, make up the nucleus of an atom. The nucleus of an atom is densely packed and occupies a very small volume in the atom at the center. Electrons are negatively charged particles that revolve around the atomic nucleus due to the electrostatic force of attraction between the protons and the electrons.
The general formula to calculate the total mass of the electrons in a
The general formula to calculate the mass of the nucleus of an atom is,
The general formula to calculate the mass fraction of the nucleus of an atom is,

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Chapter 2 Solutions
Chemistry: The Molecular Nature of Matter and Change
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- Using the general properties of equilibrium constants At a certain temperature, the equilibrium constant K for the following reaction is 2.5 × 105: CO(g) + H2O(g) CO2(g) + H2(g) Use this information to complete the following table. Suppose a 7.0 L reaction vessel is filled with 1.7 mol of CO and 1.7 mol of H2O. What can you say about the composition of the mixture in the vessel at equilibrium? What is the equilibrium constant for the following reaction? Be sure your answer has the correct number of significant digits. CO2(9)+H2(g) CO(g)+H₂O(g) What is the equilibrium constant for the following reaction? Be sure your answer has the correct number of significant digits. 3 CO(g)+3H2O(g) = 3 CO2(g)+3H2(g) There will be very little CO and H2O. x10 There will be very little CO2 and H2. 000 Neither of the above is true. K = ☐ K = ☐ 18 Ararrow_forward8. When ethane thiol is treated with hydrogen peroxide the product is___.A. ethane disulfide; B. diethyl sulfide; C. ethane sulfoxide; D. ethanesulfate; E. ethyl mercaptan. Please include all steps. Thanks!arrow_forward5. The major product of the three step reaction that takes place when 1-propanol is treated with strong acid is?A. dipropyl ether; B. propene; C. propanal; D. isopropyl propyl ether;E. 1-hexanol Please include all steps. Thank you!arrow_forward
- 6. The formula of the product of the addition of HCN to benzaldehydeis ___.A. C8H7NO; B. C8H6NO; C. C14H11NO; D. C9H9NO; E. C9H8NO Please include all steps. Thank you!arrow_forwardPredicting the qualitative acid-base properties of salts Consider the following data on some weak acids and weak bases: base acid K K a name formula name formula nitrous acid HNO2 4.5×10 hydroxylamine HONH2 1.1 × 10 8 hypochlorous acid HCIO 8 3.0 × 10 methylamine CH3NH2 | 4.4 × 10¯ 4 Use this data to rank the following solutions in order of increasing pH. In other words, select a '1' next to the solution that will have the lowest pH, a '2' next to the solution that will have the next lowest pH, and so on. 0.1 M KCIO solution PH choose one 0.1 M NaNO2 0.1 M CH3NH3Br 0.1 M NaBr choose one ✓ choose one v ✓ choose one 1 (lowest) ☑ 2 3 4 (highest)arrow_forwardFor this Orgo problem, don't worry about question 3 below it. Please explain your thought process, all your steps, and also include how you would tackle a similar problem. Thank you!arrow_forward
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