A chloride of rhenium contains 63.6% rhenium. What is the name of this compound?

Question

Natalie Anton · Accepted Answer

Empirical formula is #ReCl_3#.

In #100# #g# of the metal species, there are #(63.6*g)/(186.21*g*mol^-1)# #=# #0.342# #mol# #Re#, and #(36.4*g)/(35.45*g*mol^-1)# #=# #1.03# #mol# #Cl#. If we divide through by the lowest molar quantity (#0.342# #mol#), we get an empirical formula of #ReCl_3#, rhenium trichloride or rhenium (III) chloride. Do I win £5-00?

Luna Chen · Answer

This compound is rhenium(III) chloride.

https://tutor.hix.ai We are going to find the empirical formula for this compound, which is made up of chlorine (Cl) and rhenium (Re). Since chlorine is the only other element present, we can determine the percentage of chlorine in the compound by deducting the rhenium percentage from 100%. #100%.0-63.6%=36.4% "Cl"# We can assume a 100-g sample of the compound because the percentages add up to 100. The percentages then translate to mass in grams. Moles of Each Element: To find the moles of each element, divide its mass by its molar mass, which is represented by the atomic weight in grammes per mole on the periodic table. #63.6cancel"g Re"xx(1"mol Re")/(186.207cancel"g Re")="0.342 mol Re"# #36.4cancel"g Cl"xx(1"mol Cl")/(35.453cancel"g Cl")="1.027 mol Cl"# Mole Ratios and the Empirical Formula Divide the moles of each element by the minimum number of moles to find the mole ratio of that element. #"Re":##(0.342cancel"mol")/(0.342cancel"mol")="1.00"# #"Cl":##(1.027cancel"mol")/(0.342cancel"mol")="3.00"# The empirical formula is #"ReCl"_3"#. This compound is identified as rhenium(III) chloride by chemical supplier Sigma-Aldrich, with an empirical formula mass of 292.6 g/mol. https://tutor.hix.ai while maintaining the US-wide language

Luna Chen · Answer

undefined The compound is called rhenium(III) chloride, ReCl3.