Question

State the fraction of gold present in an 18 carat gold piece
2. write the balanced equation for the following---
1)sodium reacts with oxygen
2) aluminum reacts with dilute hydrochloric acid​
Guys please solve it fast

Answer 1

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1. In 18K gold is 75%gold mixed with 25%of other metals like copper , silver , etc .

2. i) Sodium reacts with oxygen

Ans = Na + o2 ===> Na2O

balancing equation

= 2 Na + o2 ===> Na2O

ii) Alluminum reacts with dilute hydrochloric acid

Ans = Al + Hcl ===> AlCl3 + H2

balancing equation

= 2Al + 6 Hcl ===> 2AlCl3 + 3H2

Answer 2

Step-by-step explanation:

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1. 18K gold is 75% gold mixed with 25% of other metals like copper, silver etc.

2.

➡ 4Na + O2 ----> 2Na2O

➡ Al3 + 2HCL -----> Al3Cl2 + H2

hope it helps...............