Explanation

Moles needed = 0.5 × 0.1 = 0.05 mol

Molar mass of CaCl₂ = 111 g/mol

Required mass = 0.05 × 111 = 5.55 g

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Explanation

• Amino acids are the building blocks of proteins.
• Proteins are formed when amino acids join together by peptide bonds.
• Proteins are essential for growth, repair, and body functions.
• There are 20 standard amino acids used to make proteins.

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Explanation

• Nitrogen (N₂): 78%

Additional information:

• Oxygen (O₂): 21%
• Argon (Ar): 0.93%
• Carbon dioxide (CO₂): ~0.04%
• Other gases: ~0.03%

Last verified on 16-05-2026

Explanation

• Alkynes → Triple bond (C≡C)
• Example of an alkyne: Ethyne (Acetylene, C₂H₂)

Additional information:

• Alkanes → Single bond (C–C)
• Alkenes → Double bond (C=C)

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Explanation

• Chemical Formula: CH₃COOH (also written as C₂H₄O₂)
• IUPAC Name: Ethanoic Acid
• Type: Weak organic (carboxylic) acid
• Molar Mass: 60.05 g/mol
• Found in: Vinegar (about 4–8% acetic acid)

Last verified on 12-07-2026

Explanation

• The chemical formula of ethyne is C₂H₂.
• Ethyne is the simplest alkyne.
• It is contains a triple bond between two carbon atoms.
• It is also commonly known as acetylene.
• It is a colorless, highly flammable gas.

Additional information:

• Methane → CH₄ (Alkane)
• Ethene → C₂H₄ (Alkene)
• Propene → C₃H₆
• Propyne → C₃H₄

Last verified on 11-07-2026

Explanation

• Stearic acid is a saturated fatty acid containing 18 carbon atoms (C18:0).
• It has no double bonds between carbon atoms, which makes it saturated.
• It is commonly found in animal fats and some vegetable fats.

Additional information:

• Palmitic acid – Saturated fatty acid (C16:0)
• Oleic acid – Unsaturated fatty acid (C18:1)
• Linoleic acid – Unsaturated fatty acid (C18:2)
• Linolenic acid – Unsaturated fatty acid (C18:3)

Last verified on 11-07-2026

Explanation

• Chemical Name: Acetic Acid (Ethanoic Acid)
• Chemical Formula: CH₃COOH
• Vinegar Concentration: 4–8% Acetic Acid
• Type of Acid: Weak Organic Acid
• Uses: Food seasoning, pickling, preservation, cleaning

Last verified on 10-07-2026

Explanation

• Raw Materials: Ammonia (NH₃) and Carbon Dioxide (CO₂)
• Chemical Formula: CO(NH₂)₂
• Nitrogen Content: 46%
• Type: Nitrogen fertilizer
• Industrial Process: Bosch–Meiser process

Last verified on 09-07-2026

Explanation

• The pH value of pure water at room temperature is 7.
• A pH of 7 means the solution is neutral.
• Pure water contains equal amounts of H⁺ and OH⁻ ions.
• The pH scale ranges from 0 to 14.
• Room temperature is approximately 25°C.