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explain why barium sulfate is used in barium meals despite being toxic

barium sulfate is insoluble
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Answered by Sagar S. • Chemistry tutor
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name 3 organelles that are present only in plant cells

cell wall, vacoule, chloroplasts
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Answered by Sagar S. • Biology tutor
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Describe the benedicts test for non reducing sugars

heat with HCl 2) neutralise with NAHCO3 3) add benedicts soln and gently heat in a water bath 4) if the soln changes colour from blue to a brick red precipitate, then non reducing sugars were involved, if no...
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Answered by Sagar S. • Biology tutor
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I feel confident in reading and talking about a text, but how do I turn this into an essay?

The most important thing about essay writing, whether it is for a homework assignment or in the high pressure environment of an exam, is technique. H ow you make your arguments is just as (if not more) impor...
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Answered by Henry B. • English tutor
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What is the difference between moles and molar?

Lets start with what a concentration is. Concentration is the amount of something in a volume. For example, 1 gram of sugar in one litre of water is 1 gram per litre. This can be written as 1g/L (the divisio...
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Answered by Ben R. • Chemistry tutor
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