Describe how detergents (e. g. washing powder) are able to remove greasy stains from our clothes.
The water in Gothenburg is "soft". What is meant by soft water and why do we need
to use less detergent in soft water areas and more detergent in hard water areas.

Which real-world scenarios below represent physical and chemical changes? -running a car -exploding fireworks -mixing water and powdered drink mix -combining oil and vinegar to make salad dressing -taking aspirin for a headache -diluting bleach with water-digesting dinner-spreading peanut butter on bread

Why does a red shoe appear red in daylight

Which element is the least metallic between cadmium, silver, zinc, or iron?