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What is the concentration of 0.4 moles of 25cm3 ethanoic acid?

concentration = moles / volume must convert volume into litres 1 litre = 1000cm3 (divide by 1000) c= n/v = 0.4/0.025 = 16mol/l
EM
Answered by Emma M. • Chemistry tutor
3861 Views

If there are 30 bases of cytosine in DNA, then how many bases of thymine are there?

Ok, so complementary base pairing occurs within DNA -- cytosine and guanine, adenine and thymine. So if there is 30 bases of cytosine then there MUST be 30 bases of guanine which then equals 60. So to make a...
EM
19776 Views

How do I sketch a graph of a polynomial function?

To sketch a polynomial function (a polynomial is a function involving powers of x, for example y = x 3 + 2x 2 - 13x + 10): 1. Start by differentiating the function to find its turning points (where the first...
RA
Answered by Rose A. • Maths tutor
9787 Views

How can I tell which prepositions take the accusative and which take the dative?

Prepositions are little words that describe the location of something, or where it’s going, like for, to, in, on, over, under in English. In German, they change the case of the noun that follows them. In ord...
FM
Answered by Francesca M. • German tutor
4207 Views

Why are there different impacts of flooding in MEDCs and LEDCs?

There is a difference in the impact of flooding between MEDCs and LEDCs because of socio econmomic factors. MEDCs have better flood warning systems to alert the population to the possibility of a flood occur...
MT
Answered by Matthew T. • Geography tutor
14644 Views