Grams, approximately of NaCN are needed to extract 20 g of gold from ore is ( Au =197) 4 Au +8 NaCN +2 N 2 O + O 2 arrow 4 Na [ Au ( CN )2]+4 NaOH

Question

Grams, approximately of NaCN are needed to extract 20 g of gold from ore is ( Au =197) 4 Au +8 NaCN +2 N 2 O + O 2 arrow 4 Na [ Au ( CN )2]+4 NaOH (A)  (B)  (C)  (D)

Tardigrade Admin · Accepted Answer

underset underset1974× 1974 Au + underset underset7888× 498 NaCN +2 H 2 O + O 2 arrow 4 Na [ Au ( CN )2]+4 NaOH For 20 gm approximately 10 gm of NaCN is required.

Q. Grams, approximately of $N a CN$ are needed to extract $20 g$ of gold from ore is ____ $(A u = 197)$
$4 A u + 8 N a CN + 2 N_{2} O + O_{2} \to 4 N a [A u (CN)_{2}] + 4 N a O H$

$197 4 \times 197 4 A u + 788 8 \times 49 8 N a CN + 2 H_{2} O + O_{2} \to 4 N a [A u (CN)_{2}] + 4 N a O H$

For $20 g m$ approximately $10 g m$ of $N a CN$ is required.

Q. Grams, approximately of NaCN are needed to extract 20g of gold from ore is ____(Au=197) 4Au+8NaCN+2N2​O+O2​→4Na[Au(CN)2​]+4NaOH

1974×197​4Au​+7888×49​8NaCN​+2H2​O+O2​→4Na[Au(CN)2​]+4NaOH For 20gm approximately 10gm of NaCN is required.

Q. Grams, approximately of $N a CN$ are needed to extract $20 g$ of gold from ore is ____ $(A u = 197)$
$4 A u + 8 N a CN + 2 N_{2} O + O_{2} \to 4 N a [A u (CN)_{2}] + 4 N a O H$

$197 4 \times 197 4 A u + 788 8 \times 49 8 N a CN + 2 H_{2} O + O_{2} \to 4 N a [A u (CN)_{2}] + 4 N a O H$

For $20 g m$ approximately $10 g m$ of $N a CN$ is required.