Answer :
The atmospheric pressure of water if boiling at 81 °C will be 369 mmHg.
Explanation : The vapor pressure of boiling water can be calculated using the Antoine Equation:
log P = A - ,
where P is the pressure in mmHg,
A = 8.07131,
B = 1730.63
C = 233.426
and T = temperature in °C (81°C)
Substituting the given values, we get,
Log P = 8.07131−
Therefore, Log P =8.07131 − 5.5041 = 2.567.
Now, P = =369 mmHg.
Hence, the atmospheric pressure will be 369 mmHg.
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Answer: solid
Explanation: Chemical reactions are those which involve rearrangement of atoms.
Chemical changes are accompanied by following changes:
1) Absorption or release of heat
2) Change in color
3) Formation of gas bubbles
4) Formation of a solid product called as precipitate
Example of formation of precipitate or solid in chemical reaction:
Answer:
Cool air moves down while hot air rises
Answer:
4
Explanation:
The equation for the reaction between bismuth(III) hypochlorite and acetic acid can be represented as:
Bi(ClO)₃ + 3CH₃COOH ------------------> Bi(CCH₃COO)₃ + 3 HClO
₃
Bi⁺³ + 3ClO⁻₃ + 3CH₃COO⁻ + 3H⁺-----------> Bi(CH₃COO)₃ + 3H⁺ + 3ClO
⁻₃
From the above reaction, we can therefore conclude that the free ions that are present at the product side of the total ionic concentration = 4.