The terms α particle, β particle, γ ray and X ray need to be defined. Concept introduction: α particles or α rays are made up of positively charged particles which are deflected away from a positively charged plate. This is emitted by radioactive substances. β particles or β rays are made up of electrons which are deflected away from a negatively charged plate. This is emitted by radioactive substances. γ rays are of high energy. They have no charge. Therefore they are unaffected by external magnetic or electric field. This is emitted by radioactive substances. X rays are produced when cathode rays are pointed towards glass or metal. X rays have high energy to penetrate matter. X rays are not deflected by electric or magnetic fields, which tells that X rays do not have charged particles.

Question

: Naming the Alkanes a) Write the IUPAC nomenclature of the compound below b) Draw 4-isopropyl-2,4,5-trimethylheptane, identify the primary, secondary, tertiary, and quaternary carbons. c) Rank pentane, neopentane and isopentane for boiling point. pentane: H3C-CH2-CH2-CH2-CH3 neopentane: CH3 H3C-C-CH3 isopentane: CH3 CH3 H3C-CH2-CH-CH3

Answer 1

Question

Chapter 2, Problem 2.3QP

Interpretation Introduction

Interpretation:

The terms α particle, β particle, γ ray and X ray need to be defined.

Concept introduction:

α particles or α rays are made up of positively charged particles which are deflected away from a positively charged plate. This is emitted by radioactive substances.

β particles or β rays are made up of electrons which are deflected away from a negatively charged plate. This is emitted by radioactive substances.

γ rays are of high energy. They have no charge. Therefore they are unaffected by external magnetic or electric field. This is emitted by radioactive substances.

X rays are produced when cathode rays are pointed towards glass or metal. X rays have high energy to penetrate matter. X rays are not deflected by electric or magnetic fields, which tells that X rays do not have charged particles.

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: Naming the Alkanes a) Write the IUPAC nomenclature of the compound below b) Draw 4-isopropyl-2,4,5-trimethylheptane, identify the primary, secondary, tertiary, and quaternary carbons. c) Rank pentane, neopentane and isopentane for boiling point. pentane: H3C-CH2-CH2-CH2-CH3 neopentane: CH3 H3C-C-CH3 isopentane: CH3 CH3 H3C-CH2-CH-CH3

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10.00 g of Compound X with molecular formula C₂Hg are burned in a constant-pressure calorimeter containing 40.00 kg of water at 25 °C. The temperature of the water is observed to rise by 2.604 °C. (You may assume all the heat released by the reaction is absorbed by the water, and none by the calorimeter itself.) Calculate the standard heat of formation of Compound X at 25 °C. Be sure your answer has a unit symbol, if necessary, and round it to the correct number of significant digits.