![]() ![]() Webster's Second International Dictionary, 1934 showed Dord as a synonym for density. It's a ghost word, an accidental creation that came to be reproduced in dictionaries. You can also check it out by way of the units: (g / cm 3) x cm 3 cancels out the volume unit leaving grams, the desired unit for mass. This leave you with dV (ignore the fact that it is in the denominator). Simply cover up whichever value you need to calculate and the other two are shown in their proper placement, be it to multiply or to divide.įor example, cover up the M. ![]() This reminder might help you in figuring out how to solve density problems: This means that sometimes the density of a liquid is described using cm 3 and the density of a solid is described using mL. Since one mL equals one cm 3, there is no functional difference between g/cm 3 and g/mL. Solids: d = grams ÷ cubic centimeters (cm 3 is the symbol for cubic centimeters) The unit for cubic centimeters is cm 3 and for milliliters is mL. Note the difference in units in the formulas of the density of a solid and liquid. We will ignore these small amounts and act as if all our density problems are at the same temperature and pressure. Although the density of liquids and solids do change with temperature and pressure changes, the amount is fairly small. ![]() The density of a gas will be dealt with in a later unit, because its density is very sensitive to temperature and pressure. We can calculate the density of a solid, liquid, or gas. However, a lower-case d is more often used in intoductory settings like the one you are currently reading. Oftentimes, the rho shape that a textbook would use looks more like the lower-case letter p. This is shown in equation form, as follows:īy the way, the lower-case Greek letter rho, ρ, is also used to symbolize density. Density is calculated by dividing the mass of an object by its volume. Density (whose most common symbol is the lowercase letter d) is defined as mass per unit volume. There are physical characteristics of a substance that help identify the substance. Twenty Examples Probs #1-10 Probs #11-25 Probs #26-50 All the examples & problems, no solutions Significant Figures Menu ![]()
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