A cup of cocoa is left on the counter. Which best describes how its temperature changes? a) the heat leaves the cup of cocoa b) cold enters the cup of cocoa c) the molecules in the cocoa speed up d) the temperature will not change

What is the smallest possible pieceof an element

How many grams of NaCl are needed to be dissolved in water to make 1.0 gram of a 100.0 ppm solution

Which of the following is a chemical reaction? 1-Painting a wall blue 2-A bicycle rusting 3-Ice cream melting 4-Making a sand castle

What four elements did the ancient greeks think the world was made of?

Which of the following is the correct definition of convection? A. the transfer of heat by currents B. the transmission of heat across matter C. the electromagnetic radiation from the surface of an object which is due to the object's temperature D.

Is MgCO3 a correct chemical formula

Water is an exaple of a mixture because it is made up of hydrogen and oxygen atoms bonded together true or false

Chlorine plus lithium bromide

What is the independent and dependent variable of the sentence" you decide to clean the bathroom. You notice that the shower is covered in a strange green slime. You decide to try to get rid of this slime by adding lemon juice.

M=40g V=31cm^3 what is the density