Is turning on a light bulb a physical and chemical change?

I like this guy but i don't think he likes me back. he also goes to school somewhere else, but we see eachother every friday. he doesn't talk to me he just looks at me and looks away. what do i do ...

What is the molecular formula of a molecule if its molar mass is 290 g/mol and its empirical formula is C6H8O?

If a sample of gas is at 672 °C and 3.9 atm, what is the new temperature at 12.2 atm?

If a titration of hcl with naoh took 15.25ml of a 0.1250 m naoh solution, how many moles of naoh was used

The element lead (Pb) consists of four naturally occurring isotopes with atomic masses 203.97302,205.97444,206.97587, and 207.97663 amu. The relative abundances of these four isotopes are 1.4,24.1,22.1, and 52.4 %, respectively.

Which set of procedures and observations indicates a chemical change? A) Ethanol is added to an empty beaker and the ethanol eventually disappears. B) A solid is gently heated in a crucible and the solid slowly turns to liquid.

If 100 grams citric acid react with 100 g baking soda how many grams of carbon dioxide?

What state of matter undergoes changes in volume most easily? a. solidb. liquidc. gasd. frozen

What was the result of the atomic theory?

Explain mitosis and meiosis in your own words.