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Nitrogen reacts with hydrogen to produce ammonia. Calculate the mass of ammonia made from 84.0g of nitrogen.

(1) First, write out the equation if it is not given: N 2 + 3H 2 ---> 2NH 3 (2) Calculate the moles of nitrogen in the reaction using the information you have; in this case it is mass and relative formula...
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Answered by Thivya T. • Chemistry tutor
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What is a pathogen? and how does it cause disease?

Pathogens are microorganisms that cause disease. They may be bacteria, viruses, protists or funghi. They can infect animals and plants, causing a wide range of diseases. Pathogens, such as bacteria and virus...
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Answered by Hugh P. • Biology tutor
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What is the function of a neurone?

The CNS (Central Nervous System) consists of the brain and the spinal cord. Neurones, found in the nervous system, are nerve cells that carry information in the form of electrical signals/impulses. There are...
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Answered by Vinya R. • Biology tutor
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Describe the action of enzymes including how they are denatured, using the lock and key model

The key is the enzyme and substrate is the lock. Like a key only unlocks one lock, the active site on the enzyme only fits in 1 type of substrate. Extreme temperature or pH (how acidic something is) denature...
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Answered by Emily T. • Biology tutor
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Solve x^2+5x+6=0 by factorising

First of all, when we expand brackets we know that the x will be at the start of the brackets (x )(x )= 0 Look a the equation again, x 2 +5x+6=0. All of our numbers are positive so we know that we don't need...
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Answered by Emily T. • Maths tutor
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