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(g) calculate the relative formula mass (m_(t)) of gold chloride (aucl_(3)) relative atomic masses (a_(1)):cl=35.5au=197 __ relative

Question

(g) Calculate the relative formula mass (M_(t)) of gold chloride (AuCl_(3)) Relative atomic masses (A_(1)):Cl=35.5Au=197 __ Relative formula mass (M_(r))= __

Answer

4 (358 Votes)
Verificación de expertos
Nathan Master · Tutor for 5 years

Answer

Mr = 197 + (35.5 * 3) = 304.5

Explanation

The relative formula mass (Mr) of a substance is calculated by adding together the relative atomic masses (Ar) of the atoms in the amounts shown in the formula. Here, our substance is gold chloride (AuCl3). The question has given us the relative atomic masses: Cl (Chlorine) = 35.5 and Au (Gold) = 197.Gold chloride (AuCl3) has 1 atom of Gold for every 3 atoms of Chlorine.So, we need to add the relative atomic mass of Gold (197) to three times the relative atomic mass of Chlorine (35.5 * 3).In other words, we need to compute: Mr = 197 + (35.5 * 3).