Why is alloy stainless steel used instead of pure iron for the ball of pen of pure iron for a ball of pen

What phase of matter has particles that are held together but can flow past each other and takes the shape of a container, filling it from the bottom up?

Ted and emily played a mixed doubles tennis match against jack and brenda. in the second match. ted and brenda played against jack and emily. which type of chemical reaction does the situation demonstrate?

What is the molar mass of potassium nitrate, kno3