Which two types of particles exist in equal numbers in an atom? protons and electrons protons and neutrons protons and photons electrons and neutrons

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

How many miles of water are produced if 5.43 mol pbo2 are consumed

What are four significant sources of ghgs that come from wostem washington?