Which piece of evidence would prove that a reaction is exothermic

According to the kinetic molecular theory, which statement describes the particles in a sample of an ideal gas? (1) The force of attraction between the gas particles is strong. (2) The motion of the gas particles is random and straight-line.

What is the percentage by mass of nacl in a saturated solution of sodium chloride at 50c

Are specialists who apply information gathered from past scientific investigations to develop new technologies.

How does a fan use electrical energy? (a) The fan turns electrical energy into energy of motion. (b) The fan turns wind energy into electrical energy. (c) The blades of the fan spin and produce electrical energy.

Give the state of matter that water is in as it moves through earths system

What is it called when copper can be stretched into s thin wire?

What river basin provide river water to charolette and gastoia?

8. Calculate the molar mass of an alkane with the mole- cular formula C H18.

What is DNA? What information does it carry? Where is DNA located?

5. Differences in which property allow the separation of a sample of sand and seawater by filtration? A) concentration of ions B) volume of sample C) mass of sample D) particle size