If an atom of sodium has 11 protons, what is its approximate atomic mass?

Is it physical change or chemical change when you smooth a wood chair with sandpaper?

The ratio of the mass of a substance to its volume is called___. Fill in the blank

Compare the likeness and differences of the following pairs base acid

When solid ammonium chloride dissociates at a certain temperature in a 0.500 dm3 container, ammonia and hydrogen chloride are formed. NH4Cl (s) NH3 (g) + HCl (g) The initial amount of ammonium chloride was 1.

A small child watches as you stir a spoonful of sugar into your kool aid the child says she believes that the sugar went away because it seemed to disappear.

What is toxicity? Give an example of something from your home.

Why was it important to polish the copper strips and wire, the coin, and the nail in the electroplating experiment? You need to remove a layer of copper from the surface of each material.

Which response includes all the following that are properties of most metals, and no other properties? Z1) They tend to form cations. Z2) They have high first ionization energies. Z3) They have outer electronic shells that are more than half-filled.

How many o atoms are present in 1.04 mol of mgso4?

What would happen if the proteins that support a DNA molecule failed to function