An unknown substance gives a red flame test and its solution yields a cloudy, white precipitate with carbonate. What element(s) might be present in this substance? Explain your choice.

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

According to periodic trend, which of the following most likely has the highest ionization energy? kr be ni sc

How many moles are in 43.9 l of oxygen