Pieces of metal are welded together in an atmosphere of argon. Explain why an atmosphere of argon is used.

Graph the lines y = 3x, y = 3x - 3, and y = 3x + 3. What do you notice about the lines? Make a conjecture based on your observation. It says chemistry but it's really math.

The scientific evidence that scientists use in supporting or critiquing the conclusions of experiments usually consists of

When the liquid state and the gaseous state of a substance are in equilibrium the rate of evaporation is?

How do particles move?

To be classified as organic, a chemical es molecules must be A. Based on oxygen B. Living C. Based on carbon D. decomposed

A change of state requires the addition or removal of heat energy. True False

Trevor watches as a freight train passes. He counts eight identical black railroad cars, then a red car, followed by several more black cars.

How long does a hydrogen bond last in water

If the body temperature of a person is recorded as 37°c, what is the person's body temperature in k? round your answer to the nearest whole number.

Pf3cl2 is a nonpolar molecule. based on this information, determine the f-p-f bond angle, the cl-p-cl bond angle, and the f-p-cl bond angle. enter the number of degrees of the f-p-f, cl-p-cl, and f-p-cl bond angles, separated by commas (e. g.