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kati45 [8]
3 years ago
11

___________ is a two or more elements chemically combined in a fixed ratio.

Chemistry
1 answer:
AleksandrR [38]3 years ago
5 0

Answer:

A compound

Explanation:

A compound is chemical entity that is formed when 2 or more elements are joined together in a fixed ratio.

This fixed ratio is simply the numerical values of the numbers of these elements. Take for example in the case of water, one atom of oxygen joins together with two atoms of hydrogen. The fixed ratio here is 1 to 2 or 2 to 1 depending on the reference element.

For example also in methane. The molecular formula of Methane is CH4. The ratio between carbon and hydrogen is 1 to 4 here

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Answer:

The heat of vaporisation of methanol is "3.48 KJ/Mol"

Explanation:

The amount of heat energy required to convert or transform  1 gram of liquid to vapour is called heat of vaporisation

When 8.7 KJ of heat energy is required to vaporize 2.5 mol of liquid methanol.

Hence, for 1 mol of liquid methanol, amount of heat energy required to evaporate the methanol is =   \frac{8.7}{2.5}KJ

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So, the heat of vaporization \delta H_{vap} = 3.48KJ/Mol

Therefore, the heat of vaporization of methanol is 3.48KJ/Mol

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Answer:

Whether you get the metal or hydrogen during electrolysis depends on the position of the metal in the reactivity series: the metal will be produced if it is less reactive than hydrogen. hydrogen will be produced if the metal is more reactive than hydrogen.

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