Greenhouse gases absorb outgoing infrared radiation from Earth, trapping heat and warming the atmosphere. Ozone absorbs UV; global warming is primarily IR.
Explanation:
Soap (sodium carboxylate) reacts with Ca²⁺/Mg²⁺ to form insoluble calcium or magnesium carboxylate (scum). This precipitates and reduces cleaning efficiency. Sodium and potassium salts are soluble. This is why detergents, which form soluble Ca/Mg salts, are used. Scum is visible in hard water areas.
Explanation:
Liquids have a definite volume but take the shape of their container. Solids have the least intermolecular space and highest density. Gases have maximum intermolecular space and are highly compressible. This relates directly to the kinetic theory of matter, which describes particle arrangement and movement in different states.
Explanation:
Enzymes are complex organic molecules that act as biological catalysts in living organisms. Chemically, most enzymes are globular proteins. They are highly specific to their substrates and work optimally at body temperature and near-neutral pH, unlike many industrial catalysts that require extreme conditions.
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