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Why does calcium nitrate decompose in a similar way to magnesium nitrate, but require a higher temperature for decomposition?

Calcium ions (Ca 2+ ) have the same charge as magnesium ions (Mg 2+ ) but Ca 2+ ions have a larger ionic radius (as ionic radius increases down the group). This means Ca 2+ has a lower charge density than Mg...
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Answered by Keziah A. • Chemistry tutor
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How can you convert benzene to N-phenylethanamide in 3 steps?

Step 1: Nitration of benzene Benzene + conc. H 2 SO 4 + conc. HNO 3 with heat & under reflux --> Nitrobenzene Step 2: Reduction of nitrobenzene Nitrobenzene + tin + conc. HCl with heat & under ref...
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Answered by Keziah A. • Chemistry tutor
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How does a vaccine lead to the production of antibodies against a virus?

The vaccine contains antigens of the virus. When injected, these antigens are recognised by macrophages which engulf the antigen and present the antigens on their surface. Once the antigens are presented, th...
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Answered by Keziah A. • Biology tutor
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How should I use incorporate secondary, critical quotations into my own responses to literature?

It's important to approach the critics with a critical attitude. This means applying to the secondary material the same rigour and attention which you give to the primary material. You can do this in a few d...
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Answered by William B. • English tutor
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Find the exact value of the integral of (2+7/x), between x=1 and x=e. Give your answer in terms of e.

1.) Find the integral of each term. --> [2x +7ln(x)]. --> Uses standard integrals--> e.g. that the integral of 1/x is ln(x). 2.) substitute values into the integral. --> [2(e)+ 7ln(e)]- [2(1)+7ln...
Answered by • Maths tutor
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