# What effect does the size or amount of a substance have on its density?

## What effect does the size or amount of a substance have on its density?

In other words, the size or amount of a material/substance does not affect its density.

## What does mass have to do with molecules?

Molecular Mass Definition Molecular mass is a number equal to the sum of the atomic masses of the atoms in a molecule. The molecular mass gives the mass of a molecule relative to that of the 12C atom, which is taken to have a mass of 12.

How does molecular structure affect density?

In some cases, materials made of atoms with a lower atomic weight have a greater density than those with a higher atomic weight, due to the atoms being more tightly packed. This is especially true for solids. Non-standard conditions can result in a change of volume, affecting the density of the materials.

What is the relationship between mass and size?

Volume is the size of an object, and mass is its weight. To get density, divide mass by volume. For example, a lead brick, 5 cm x 2 cm x 10 cm, weighs 1,134 g. The brick’s volume is 5 x 2 x 10 = 100 cubic cm.

### What effect does size or shape have on density explain why?

Changing the shape does not change its mass or volume, so density remains the same.

### Does the size of an object affect its temperature?

Does the size of an object affect its temperature? Temperature and Thermal Energy If two objects have the same mass, the object with the higher temperature has greater thermal energy. That’s because an object’s mass also affects its thermal energy.

What is the difference between the mass of a molecule and molecular mass?

Molecular mass is expressed in atomic mass units….Molar mass:

Difference between Molar mass and Molecular mass
Refers to mass of a mole of a substance Refers to the mass of molecules
Also known as molecular weight It determines the mass of a single molecule
SI unit is g/mol to use in higher calculations Measured in amu

Why does the mass change when you make an object bigger?

Weight is a measure of how gravity affects the mass of an object. Mass is the amount of matter in an object and does not change with location. However, because Jupiter is larger, the weight of the object would be different. In other words, the two planets would exert a different gravitational force on the same object.