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lina2011 [118]
3 years ago
13

What is the oxidation state of nitrogen in NaNO2? (1) +1 (3) +3 (2) +2 (4) +4

Chemistry
1 answer:
slava [35]3 years ago
4 0
The answer is (3) +3. The Na ion usually has oxidation state of +1. The O ion usually has oxidation state of -2. And the total of oxidation state needs to be zero. Then we can calculate the oxidation state of nitrogen.
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When 2.50 g of an unknown weak acid (ha) with a molar mass of 85.0 g/mol is dissolved in 250.0 g of water, the freezing point of
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When dT = Kf * molality * i
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and when molality = (no of moles of solute) / Kg of solvent
                               = 2.5g /250g x 1 mol /85 g x1000g/kg
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∴K = Ca^2/(1-a)
     = (0.1176 * 0.359)^2 / (1-0.359)
     = 2.8x10^-3



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