Question

please help????????????

Answer 1

The nitrate that leaves no residue is Ammonium nitrate

The alloy that enhances expansion capacity on solidification is a Type Metal.

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$NH_{4}NO_{3} (s) \implies 2 H_{2}0(g) + N_{2}O (g)$

Hence no residue is formed.

Both are gaseous products.

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Type metal consists of :

• Sn (5%)
• Pb(75%) - main component
• Sb (20%)

Sb(antimony) and Sn(tin) lowers the melting point of the alloy.

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Hope it helps you :-)

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