Calculs de concentration

On prépare $0{,}0750\,\text{L}$0, comma, 0750, start text, L, end text de solution aqueuse de chlorure de cobalt (II), $\text{CoCl}_2$start text, C, o, C, l, end text, start subscript, 2, end subscript, à la concentration $0{,}674\,\text {mol/L}$0, comma, 674, start text, m, o, l, slash, L, end text. La masse molaire de $\text{CoCl}_2$start text, C, o, C, l, end text, start subscript, 2, end subscript est $128{,}9\,\dfrac{\text{g}}{\text{mol}}$128, comma, 9, start fraction, start text, g, end text, divided by, start text, m, o, l, end text, end fraction.

$\text {g}$start text, g, end text