What conditions lead you to see an absorption line spectrum from a cloud of gas in interstellar space?

5.00 g of molten NaCl is at its melting temperature. The salt is added to 25.00 mL water at 25.0 °C in a coffee cup calorimeter. The salt becomes solid and the temperature of the water increases to 47.9 °C.

True or False: Newton's Second Law of Motion states acceleration depends on the objects mass and on the force acting on the object.

Which nonmetal makes up diamond, graphite, and the majority of coal? A - Oxygen B - Sodium C - Magnesium D - Carbon

Jaipal measures a circuit at 1.2 A and 24. Using Ohm's law, what can he calculate for the circuit? A. current (C) B. current (I) C. voltage (V) D. voltage (A)

Which of the following happens when a material undergoes a phase change? a. The temperature changes. b. Heat flows into or out of the material. c. The chemical composition changes. d. The molecules break apart into atoms.

Dr. Arenas is a scientist who has been trying to determine if increasing pressure will increase the sound that occurs when two chemicals explode.

Stephen buys a new mop he travels 3 km south and the. 4 km east and then 3km north how far does he need to go to get back. To where he started

The elements with the largest atomic radii are found in the

Students will explain, distinguish the difference between the 4 states of matter

Name one way that a mixture can be separated