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I am unsure how to do this question : Will acidified potassium manganate (VII) oxidise hydrogen sulphide to sulphur in aqueous solution? Will bromine oxidise iron (II) ions in aq solution ? Will iodine " " " " " " " ? any ideas

how would you go about doing a numerical solution?

I am a little stuck how to solve this equation e^x = 5-2x? I did ln e^x = ln (5-2x) x = ln(5-2x) / ln e but iam not sure how to bring the other x around to the side with the x to solve the equation?

no for part a), i have to find log2^5 in terms of x and y i thought that by working out log2^a and then multiplying loga^5 should give log2^5??

is the answer to part a) ____log2^2______ x ( times y) ?

I think the answer to part b) is 2(xy), also is that the right answer to part a) posted above ?

thanks I have already worked this out, sorry

would that be the correct way of expressing part a) in terms of x and y?

is it (___log2^2_____ ) * y ? ( x )

If loga^2=x and loga^5=y, find in terms of x and y, expressions for a) log2^5 b) loga^20 so loga^2 = ____log^2_____ log^a so log^2 = x * log^a Iam not sure where to take it from here or whether I am even going down the right route any help/ideas welcome

then multiply that answer by (1.027)^(5-1)

I know the normal formula for compound interest is un = u1 * r^(n-1) so rearranging that would give u1 = ___(1.027)^5_____ 15.2 * 10^6

I am not too sure what to do to answer this question. Each year for the past 5 years the population of a certain country has increased by a steady rate of 2.7% per annum. The present population is 15.2 million. a) what was thepopulation 1 yr ago? b) what was the population 5 years ago? I...

I am a little stuck on this question : Solution A contains n moles of a weak acid HX. The addition of some sodium hydroxide to A neutralises one third of the HX present to produce Solution B. In terms of the amount, n how many moles of HX are present in Solution B? I think there are one...

i was talking about the time dilation formulca, is this the right one to use?