A student records the mass of a piece of iron. The iron is then left outside until it rusts. What type of reaction occurs, and how does the mass of the object after rusting compare with its original mass?

Which of the following is an example of a body-centered cubic cell?

Suppose the volume of a container is decreased, but the same number of gas molecules is present at the same temperature. What will happen to the molecules? The molecules will increase in number. The molecules will decrease in number.

what is the difference between the number of electrons in an atom selenium and the number of electrons in an atom of aluminum

Explain in complete sentences how heat is transferred in fluids.

1. What does it mean for a substance to be soluble?

Mass box A = 10 grams; Mass box B = 5 grams; Mass box C-made of one A and one B How much A and B would be needed to produce 30 grams of C? g of A; g of B.

How many moles of tin atoms are in a pure tin cup with a mass of 37.6 g?

Which best explains how Dmitri Mendeleev organized elements in his periodic table? O A. Elements were ordered based on their discovery date. O B. Elements were ordered based on their economic value. O C.

The rocks and minerals of the Earth consist of compounds.

Do the number of protons in an atom of an element always equals its atomic weight.