Is anyone good at chemistry if so can someone help me please ? (NO LINKS)

Chemistry

1 answer:

Oduvanchick [21]3 years ago

4 0

Strong acid + strong base = neutral salt;

strong acid + weak base = acidic salt;

weak acid + strong base = basic salt;

weak acid + weak base = it depends on the relative strength of the acid and base.

1. NaOH is a strong base; CH3COOH is a weak acid. The resulting salt, CH3COONa, will be basic (b).

2. HBr is a strong acid; NH3 is a weak base. The resulting salt, NH4Br, will be acidic (c).

3. H2SO4 is a strong acid; Ca(OH)2 is a strong base. The resulting salt, CaSO4, will be neutral (a).

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2 years ago

For the reaction o(g) + o2(g) → o3(g) δh o = −107.2 kj/mol given that the bond enthalpy in o2(g) is 498.7 kj/mol, calculate the

Aneli [31]

The reaction;
O(g) +O2(g)→O3(g), ΔH = sum of bond enthalpy of reactants-sum of food enthalpy of products.
ΔH = ( bond enthalpy of O(g)+bond enthalpy of O2 (g) - bond enthalpy of O3(g)
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Bond enthalpy (BE) of O3(g) is equals to 2× bond enthalpy of O3(g) because, O3(g) has two types of bonds from its lewis structure (0-0=0).
∴2BE of O3(g) = 594.9kJ/mol
Average bond enthalpy = 594.9kJ/mol/2
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∴ Averange bond enthalpy of O3(g) is 297.45kJ/mol.

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3 years ago

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Answer:

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Explanation:

Simply multiply the change in temperature by the Ccal;

(36.6 - 20.0)×5.225 = 86.735

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