Top answers

What are the 4 phases of mitosis?

Prophase, metaphase, anaphase, and telophase.
Answered by • Biology tutor
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¿Dónde fuiste en tus últimas vacaciones?

This is a typical A-level Spanish question which requires the candidate to use the past tense.
Answered by • Spanish tutor
2950 Views

What is an antibody?

An antibody is a chemical released during an infection by lymphocytes that attach to specific antigens.
JC
Answered by Jonathon C. • Biology tutor
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¿Si pudieras viajar en cualquier país de América Latina, qué país visitarías y por qué?

This is a typical A Level or Pre-U style Spanish discursive writing or oral question which requires the candidate to respond using a range of tenses and sophisticated vocabulary to talk about things relevant...
Answered by • Spanish tutor
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Calculate the pH of a 0.025 mol dm-​3​ solution of methanoic acid. For HCOOH, Ka = 1.58 x 10-​4​ mol dm-​3

This question is an acid calculation question so it requires you to recall key formulas relating to weak acids. As the Ka of HCOOH has been given, I would start by writing an expression for Ka. Ka= [HCOO-​ ]...
RH
Answered by Radia H. • Chemistry tutor
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