1. A rectangular metal tray that measured 22.55 cm by 15.33 cm was plated with a very thin layer of gold. (The density of gold is 19.32 g/cm².) The gold plating had a mass of 0.0538 g. Calculate the thickness of the plating using scientific notation and the correct number of significant figures​

i think 4.44 moles

each chemical family is represented as a group or column on the periodic table. based on chemical properties, there are 6 types of chemical families. group 1 represents alkali metals, group 2 represents alkaline earth metals, groups 3 to 12 represent transition metals, groups 13 to 16 represent non-metals and other metals, group 17 represents halogens and group 18 represents noble gases.

the formula for the conversion of temperature from degree celsius to kelvin is:

the sample of water at is converted to kelvin temperature by using the above formula as:

on comparing the two samples of water at or we can say that at and at respectively. the difference between the temperatures of two samples of water is:

hence, one can say that the sample of water at is greater than the sample of water at by .