Half-life<span> <span>(abbreviated </span>t</span>1⁄2<span>) is the time required for a quantity to reduce to
half its initial value. The term is commonly used in </span>nuclear
physics<span> <span>to describe how quickly
unstable atoms undergo, or how long stable atoms survive, </span></span>radioactive
decay<span>. since it reduce to half after 4000 years, so the
half life is 4000 years</span>
Answer:
heating makes the alcohol molecules of the liquid move faster.
Answer:
<u><em>1. The air boiled out of water as steam is rich in water vapor, </em></u><em><u>H₂O</u></em><u><em>(g)</em></u>
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<u><em>2. Benzene reacts with hydrogen in the presence of nickel catalyst at 180°C to give cyclohexane.</em></u>
Explanation:
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1. When water boils liquid water passes to gaseous phase.
Water in gaseous phase is named water vapor or steam.
This happens around 100ºC, depending on the atmospheric pressure.
The air that is around the boiling water will carry that steam, becomind an air rich in water vapor, H₂O(g)
2. Benzene has chemical formula C₆H₆.
It is a cyclic unsaturated hydrocarbon. Benzene contains 3 double bonds.
When unsaturated hydrocarbons are heated in the presence of nickel catalyst, the double bonds are broken, forming single bonds and adding the needed hydrogen to the chain: one to each carbon that had a double bond transformed into single bond.
Thus, the product of the catalytic hydrogenation of benzene, C₆H₆, is cyclohexane, C₆H₁₂
The image attached, taken fron the internet, can help you.
Answer:
Explanation:
Hello there!
In this case, according to the given information, it turns out possible for us to infer this problem is about the application of the Gay-Lussac's gas law to relate the initial and final pressure and temperature as shown below:
Thus, solving for the final pressure, P2, and using the temperatures in Kelvins, we obtain:
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