Snails growing shells is that a chemical change

What is the possible formula of a compound formed when sodium and chlorine bond

Why haven't scientists been able to study atoms directly?

If 0.0203 g of a gas dissolves in 1.39 l of water at 1.02 atmospheres at what pressure (in atm) would you be able to dissolve 0.146 g in the same amount of water?

What is the ph of a 0.01 m solution of the strong acid hno3 in water?

The graph shows the speed of a car during a trip along the highway. What can you say, in general, about the speed of the car?

Which is a pure substance A) mixture B) solution C) element

Samuel adds a teaspoon of salt to a glass of water. He notices that the song disappears. Samuel takes a sip to discover that the water taste salty. What kind of change has occurred?

How are the physical and chemical properties of atoms represented on the periodic table of elements

how do we know isotopes exist?

Is albinism a dominant or recessive trait