The mass number is the number of protons and neutrons in the nucleus of an atom.
Conservation of mass
Density relates the mass of a material to the material's volume. It is a measure of how much mass is contained in a given volume of a substance.
the number 25 is a number that relates to 5 which symbolizes grace
Mass
mass = volume x density
The mass of reactants is equal to the mass of products.
density
w=mg
No, the atomic number relates to the number of protons and electrons. say if the atomic number is 8 and the atomic mass is 17. by looking at the atomic number you can tell there are 8 protons and 8 electrons. but now you want to find the number of neutrons. you see that the atomic mass is 17. so you subtract the atomic number from the atomic mass. which is 17-8= 9. so there are 8protons, 8electrons, and 9 neutrons. hope this helps you.
The density of the substance is needed to convert mass to volume in a stoichiometry problem. Density is a measure of how much mass is contained in a given volume. It relates the mass of a substance to its volume.
The object's density relates its mass and volume, determined by dividing mass by volume. If an object's density is greater than that of the fluid it is placed in, it will sink; if less, it will float.
Density is the property that relates an object's mass to its volume. It is calculated by dividing the mass of an object by its volume. Objects with higher density are more compact and have more mass contained in a specific volume.