3 public questions tagged with this topic.
HNO₃ (N: +5) is reduced to NO (N: +2), oxidizing Sn (0 to +4).
Ref: NCERT Class 11 Chemistry > Chapter 7: Redox Reactions > Topic: Types of Redox Reactions - Combination Decomposition Displacement
N (+5 in HNO₃) to +2 in NO: 2 N gain 6 electrons. As (+3 to +5): 3 As lose 6 electrons. Per HNO₃ = 6/2 = 3.
Ref: NCERT Class 11 Chemistry > Chapter 7: Redox Reactions > Topic: Applications of Redox Reactions and Disproportionation
Mass of 1 L solution = 1000 × 1.03 = 1030 g. Mass of HNO₃ = 0.8 × 63 = 50.4 g. Mass of water = 1030 − 50.4 = 979.6 g = 0.9796 kg. Molality = 0.8 / 0.9796 ≈ 0.816 m.
Ref: NCERT Class 11 Chemistry > Chapter 1: Some Basic Concepts of Chemistry > Topic: Concentration Terms - Molarity Molality and Mole Fraction
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