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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 (Ca2+) have the same charge as magnesium ions (Mg2+) but Ca2+ ions have a larger ionic radius (as ionic radius increases down the group). This means Ca2+...

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Answered by Keziah A. • Chemistry tutor
7250 Views

Solve the simultaneous equations x^2 + y^2 =13 and x= y - 5.

(y-5)2 + y2 = 13y2-10y +25 + y2=13.2y2-10y+12=0.y2-5y+6=0.(y-3)(y-2)=0. So, y=3 or y=2. Then substituting these values of y back into x=y-...

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Answered by Hollie D. • Maths tutor
5173 Views

Lesen Sie diesen Artikel und wählen Sie die richtigen Aussagen:

Das neue JahrZu der Party in Berlin sind hunderttausende Menschen gekommen. Es waren so viele, dass die Polizei den

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Answered by Lauren M. • German tutor
1680 Views

How can you convert benzene to N-phenylethanamide in 3 steps?

Step 1: Nitration of benzene Benzene + conc. H2SO4 + conc. HNO3 with heat & under reflux --> Nitrobenzene Step 2: Reduction of nitrobenzene Nitrobenzene + tin + con...

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Answered by Keziah A. • Chemistry tutor
14592 Views

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,...

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Answered by Keziah A. • Biology tutor
2512 Views

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