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A solution of sugar has a concentration of 3 g/dm3. What is the mass of sugar in 0.5 dm3 of solution?

The key to this question is understanding the relationship between concentration, mass and volume. Concentration shows how much of a substance (the mass) is packed into a space (the volume). This means that ...
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Answered by Daniel D. • Chemistry tutor
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Give an explanation as to why some people see religiosity as declining in the Western world. (3)

One explanation for this decline is an idea coined by Max Weber called rationality. This refers to the way rational ways of thinking have taken over that of religious ways of thinking, and can largely be att...
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Answered by Maxwell H. • Sociology tutor
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How do I approach paper 1?

Paper 1 is a source-based 'skills' examination. In the space of 1 hour you have to answer 5 questions taking into consideration four sources. At least one of these sources will be visual. Perhaps the biggest...
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Answered by Marco T. • History tutor
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Describe and explain how the eye would focus on a near object. [5]

As light passes through the cornea and lens, refraction takes place at varying degrees depending on lens shape. Objects closer to the eye have diverging light rays, thus need more refraction from the lens. T...
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Answered by Saoirse E. • Biology tutor
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The Execution of Charles - Providence or Necessity?

Before the 1640s, even those vehemently opposed to the politics of Charles neglected to blame him personally for their grievances. Pym, the spearhead of the Parliamentarian cause in the 1630s, was quoted exc...
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Answered by Oliver P. • History tutor
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