15. A chemist has gathered physical properties data on three unknown lab samples (Table 1). Based on your knowledge of the relationship between physical properties and chemical structures, indicate the likely identities of each sample. Provide support from the data to justify your choices. Table 1: The physical characteristics of three unknown solid chemical samples. Property Sample A Sample B Sample C Water Soluble No Yes No Conductor of Yes No No Electricity Relative High Low High Melting Point

Q: 2CH3CH₂ + Pb2+. SH

A: Thioalcohols react with heavy metals like Pb2+ to form insoluble compounds.

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Q: H2S + LIOH → LizS + H2O

A: The given Chemical Equation can be balanced as follows -

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A:

Q: x IV a mixture of I and II Br OCH₂CH₂ 11 CH,CH,OH 111 8X OCH

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A:

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Q: None

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Q: 11. Give the IUPAC name for each of the following aromatic compounds: a) b) HO Br. CH 3 NH₂ CH3…

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Q: new synthetic fibres in the last 15 years in the fibre industry? their chemistry their usuage

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Q: Describe the structure of collagen protein.

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Q: Part II-Drawing and Identifying Polysaccharides MODEL amylose cellulose STRUCTURE

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A: Step 1: Step 2: Step 3: Step 4:

Q: Draw a diastereomer for the following monosaccharide.

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A:

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A: Deoxy sugar is sugar in which hydroxy group is replaced by hydrogen.

States of Matter

The substance that constitutes everything in the universe is known as matter. Matter comprises atoms which in turn are composed of electrons, protons, and neutrons. Different atoms combine together to give rise to molecules that act as a foundation for all kinds of substances. There are five states of matter based on their energies of attraction, namely solid, liquid, gases, plasma, and BEC (Bose-Einstein condensates). 

Chemical Reactions and Equations

When a chemical species is transformed into another chemical species it is said to have undergone a chemical reaction. It consists of breaking existing bonds and forming new bonds by changing the position of electrons. These reactions are best explained using a chemical equation.