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Chemistry
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A sample of nitrogen gas is heated to 100°C, at a pressure of 10kPa and volume of 0.2m^3. How many moles of gas are present?

In order to answer this question, the equation: PV=nRT must be used.P is pressure, V is volume, n is moles, R is the gas constant and T is temperature. Firstly the units in the question must be converted ...

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Answered by Tara B. Chemistry tutor
10769 Views

What is the definition of "Enthalpy Change of Formation"

The Enthalpy change when one mole of product is formed from its elements under standard states and conditions.

CK
6181 Views

What at the alkali metals?

These are the group one elements on the periodic table. They are highly reactive so are stored under oil. When they react with water it is often a violent reaction. It also turns to water alkaline, hence ...

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Answered by Edward S. Chemistry tutor
3851 Views

Why does ethanoyl chloride have a lower boiling point that pentanoyl chloride?

This question is referring to the size of molecule and its relation to boiling point. The boiling point is higher when the intermolecular interactions are weaker. Intermolecular interactions are weaker in...

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Answered by Tom H. Chemistry tutor
4056 Views

State the trend in electronegativity for the elements of group 17 and explain why this trend occurs.

Electronegativity decreases from fluorine to astatine in group 17. This is because fluorine has the smallest number of electron shells in the group, which means there is less of a shielding effect than th...

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Answered by Conor D. Chemistry tutor
13486 Views

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