Roland is measuring a physical property of an object. he records the measurement:
3.12g/cm3
roland was most likely measuring which of the following:
question 1 options:
density
mass
weight
volume

option A = density

Explanation:

From the unit we came to know that the measuring property was density. because density is equal to the weight per unit volume.

Density:

Density is equal to the mass of substance divided by its volume.

Units:

SI unit of density is Kg/m3.

Other units are given below,

g/cm3, g/mL , kg/L

Symbol:

The symbol used for density is called rho. It is represented by ρ. However letter D can also be used to represent the density.

answer : one can design an experiment using a liquid and an additive that can be added to the liquid and observe the chemical changes in the reaction species.

one would need a beaker which is filled with a known amount of the liquid in which thermometer is placed to measure the temperature changes; after addition of the additive to the liquid solution one can note down the temperature change and find whether the reaction is endothermic or exothermic in nature. by subtracting the initial temperature value with the final temperature one can find the temperature changes.

various combinations of liquid and additive can be used. liquid in this case can be a known quantity of water and additives can be epsom salt or without epsom salt the experiment can be conducted to notice the changes. water and ice, hydrogen peroxide and dry yeast, vinegar and baking soda,etc.