Explain how astronomers use spectrographs to identify the composition of a star.

7. what temperature is need to just dissolve 50 g of nh4cl in 75 g of water? '

What type of energy do chemical bonds have? what type of energy is it converted to during chemical reactions? question 15 options: chemical bonds have kinetic energy, which is converted to potential energy during chemical reactions. chemical bonds have electric energy, which is converted to potential energy during chemical reactions. chemical bonds have heat energy, which is converted to kinetic energy during chemical reactions. chemical bonds have potential energy, which is converted to heat energy during chemical reactions.

When the speed of the bottle is 2 m/s, the average maximum height of the beanbag is m.