What country used the most energy in world during both 1990 and 2003?

A student dissolves equal amounts of salt in equal amounts of warm water, room-temperature water, and ice water. Which result is most likely? The salt dissolved fastest in the warm water. The salt dissolved fastest in the ice water.

A moving company is called into a building and asked to relocate 520 bricks to a location 15 meters above the ground. If each brick is 4 kilograms, what amount of work will be needed to accomplish the task? A. 305,760 J B. 229,320 J C. 203,840 J D.

Which of the following ions has largest radius

What do you think would happen if a positive ion and a negative ion were close together? (What do opposite charges do?)

Vanillin is a flavoring agent which occurs naturally in the vanilla bean, the seed of an orchid. Identify the functional group circled. A) aldehyde B) ketone C) alcohol D) carboxylic acid 34)

c. When we heat water up by the Bunsen burner, what temperature is the boiling water? After 10 minutes

Assuming that air contains 78 percent N2, 21 percent O2 and 1 percent Ar, all by volume. How many molecules of each type of gas are present in 1.0 L of air at STP?

Two children are playing tag. Child A who is doing the chasing can run 100m in 24 seconds Child B is running away from child A and can run 64m in 21 seconds.

What ion does a base increase

What is the definition of Amplitude?