D-5: Calcium + Water/Calcium + HCI 60. Observation on combining Ca metal, 2 mL of water, and 2 drops of phenolphthalein a indicator: Balanced chemical equation:

Q: So the correct answer is hydrogen bonds?

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Q: (please type answer fast).

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Q: 2- SiO₂(k)+ HF(s)-SIF(g) + H₂O(s) (SI: 28, 0:16, H:1, F: 19 g/mol, R-0,082 atm.L/mol.K) tepkimeye…

A: Density of the gas = 1.15 g/ml Volume of HF = 42 ml Mass of SiO2 = 54.06 g

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Q: Question attached

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A: Empirical Formula: H2KO4P Formula Weight (g/mol): 136g/mol Desired concentration: 15mM

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Q: What is the pH

A: This question is based on the Henderson-Hasselbach equation. According to this equation,” when the…