Chemistry: if you are given one element name and % by mass, how do you find the other element in the compound? give example plz

if you are given one element name and % by mass,

Ответ:

krandall232

09.02.2022

The percentage of elements in the compound is determined from the number of elements in the compound

Further explanation

Proust states the Comparative Law that compounds are formed from elements with the same Mass Comparison so that compounds have a fixed composition of elements

$\tt \%A~in~A_xB_y=\dfrac{x\times Ar~A}{MW~A_xB_y}\times 100\%$

$\tt \%B~in~A_xB_y=\dfrac{y\times Ar~B}{MW~A_xB_y}\times 100\%$

Example

% Lithium (Li) in Li₂CO₃(lithium carbonate)

Ar of Li = 6.941 g/mol

MW of Li₂CO₃ = 73.891 g/mol

$\tt \%Li=\dfrac{2.Ar~Li}{MW~Li_2CO_3}\times 100\%\\\\\%Li=\dfrac{2\times 6.941}{73.891}\times 100\%=18.79\%$

0,0(0 оценок)

if you are given one element name and % by mass, how do you find the other element in the compound? give example plz

Ответ:

Ответ:

Ask your question to the AI advisor

More tips

Answers on questions: Chemistry

Ask an AI advisor a question