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What is nitrogen fixation?

Nitrogen fixation is one stage of the nitrogen cycle. The nitrogen cycle describes the different transformations of the forms of nitrogen in nature. The nitrogen cycle is important because plants need nitrog...
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Answered by Eleanor B. • Biology tutor
8595 Views

How to use the conditional tense

Go through conjugating verb after verb after verb to root the conjugation in the student's mind and then start using it in sentences by saying the sentence in english and asking them to translate and then mo...
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Answered by Jessica P. • Italian tutor
2711 Views

How to write an introduction for an A-Level History exam?

For GCSE and A-Level there is a somewhat similar structure to an answer, however it depends on the mark scheme and the Assessment Objectives which need to be covered. For A-Level it is important to include a...
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Answered by Kim T. • History tutor
81274 Views

How do I answer scenario questions?

In AQA Law A Level, for units 2, 3 and 4, you will be asked a scenario question. To ensure you get the best grade you can, you need to answer the question in a specific way. First, you need to have a good un...
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Answered by Andrew M. • Law tutor
14417 Views

Given is a following reaction at equilibrium: N2(g) + 3H2(g) ⇄ 2NH3(g), ΔH < 0. What will be the effect of changing the following conditions on the system? 1. Increasing pressure. 2. Decreasing temperature. 3. Adding a catalyst. 4. Adding HCl(g).

The correct approach to this question is to use the Le Chatelier's principle, which states that when you change conditions of a system at equilibrium, the system counteracts the change - a new equilibrium is...
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Answered by Maciej K. • Chemistry tutor
22590 Views