This chemistry question involves key chemical concepts and calculations. The detailed solution below walks through each step, from identifying the reaction type to computing the final answer.

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Huu hapa ni utatuzi wa maswali:
1. a) Kijiti cha mbao kitaonekana kinang'aa kwa rangi nyekundu bila moto.
1. b) Joto kutoka kwenye mwali husababisha mbao kuoza (pyrolysis) na kuungua kidogo (char). Inapoondolewa haraka, hakuna oksijeni ya kutosha kwa mwako kamili (moto), lakini joto kali husababisha mbao iliyoungua kung'aa.
2. Ili kuonyesha jinsi elementi ya kundi la kwanza inavyoitikia na maji baridi kuunda suluhisho la alkali, fuata hatua hizi: • Weka kipande kidogo cha elementi ya Kundi la Kwanza (k.m., sodiamu) kwenye beseni la maji baridi. • Angalia mmenyuko: chuma huelea, huyeyuka na kuwa duara, hutoa povu (gesi), husogea haraka juu ya uso wa maji, na kinaweza kuwaka moto (mwali wa manjano kwa sodiamu). • Jaribu suluhisho linalotokana na karatasi ya litmus au kiashiria cha jumla. • Uchunguzi: Karatasi ya litmus itageuka bluu, au kiashiria cha jumla kitaonyesha rangi ya alkali (k.m., bluu/zambarau), ikionyesha suluhisho la alkali. • Mlinganyo wa kemikali (kwa sodiamu):
3. a) i) Aqueous magnesium chloride.
ii) Ammonia solution.
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Huu hapa ni utatuzi wa maswali: 1. a) Kijiti cha mbao kitaonekana kinang'aa kwa rangi nyekundu bila moto.
This chemistry question involves key chemical concepts and calculations. The detailed solution below walks through each step, from identifying the reaction type to computing the final answer.