How many formula units are in 1.4 g of
PbcІ, ?

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

An empty fuel tank can still contain and therefore can be even more dangerous than one full of liquid fuel.

Write a balanced equation showing the formation of copper (ii) nitrite from its elements