The density of quartz mineral was determined by adding a weighed piece to a graduated cylinder containing 50.3 mL water. After the quartz was submerged, the water level was 64.8 mL. The quartz piece weighed 38.9 g. What was the density of the quartz?

The density of the quartz is 2.68 g/mL

Explanation:

We are given:

Volume of graduated cylinder = 50.3 mL

Volume of quartz + graduated cylinder = 64.8 mL

Volume of quartz = [64.8 - 50.3] mL = 14.5 mL

To calculate the density of substance, we use the equation:

Mass of quartz = 38.9 g

Volume of quartz = 14.5 mL

Putting values in above equation, we get:

Hence, the density of the quartz is 2.68 g/mL

definition

                    entropy is a measure of the randomness or the extent of disorder of a chemical process.

                      enthalpy is a measure of the heat change of a reaction occurring at a constant pressure.

measurement units:

                        entropy is measured in joule per kelvin (jk⁻¹)   whereas enthalpy is measured in joule per mole (jmol⁻¹)

requirements:

                            entropy has no requirements or limits, and its change is measured by the division between the heat change of the chemical process and the temperature.

                              in contrast, enthalpy can only be related to the heat change of the reaction under standard conditions.