How may a substance be tested to determine whether or not it is an element

the volume of an ideal gas in a container is 2.0 L what will be the volume of the gas if the pressure on the container is doubled while the temperature is reduced from 400 K to 200 K

What can you conclude about a time in earth's past when only marine fossils formed?

How is Francium used by humans

What is the name of the most radioactive isotope on the planet?

Ice and water are two agents that can be involved in the process of weathering. Explain how freezing and thawing can cause weathering.

You move a 25N object 4 meters. Find the work you did

What is the relationship between matter and elements

Which of these would be an appropriate way to describe the concentration of orange candies? Check all that apply the number of orange candies divided by total number of candies the mass of orange candies divided by total mass of candies the volume

What can show the presence of carbon dioxide?

How does the shape of a structure affect its overall strength