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Draw the structure of chlorine pentafluoride (ClF5) according to the VSEPR theory

The molecule is uncharged, so we can find that chlorine is in its +5 oxidation state. Since there are 5 Cl-F bonds, there are 5 bonding electron pairs around the central Cl atom. We also know that chlorine i...
PS
Answered by Peter S. • Chemistry tutor
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what is the number of ion in 7.41g of calcium hydoxide Ca(OH)2 ?

number of particles = mole x Avogadro constantAvogadro constant is 6.0 × 10 23 mol –1 .Mr of Ca(OH) 2 is 7.41g mol -1 mole = Mass / Mr = 7.41/7.41 = 1 moleThe question is asking: the number of ion = ?So, in ...
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Answered by Wai W. • Chemistry tutor
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What is the difference between the RPI and CPI rate of inflation

Both the Consumer Price Index (CPI) and Retail Price Index (RPI) are ways of measuring inflation which is the average change in price of a basket of goods. The RPI, however, includes the costs of housing suc...
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Answered by Ujjaval D. • Economics tutor
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How to approach close analysis of an unseen extract

Firstly, read the extract slowly once through, don't rush and attempt to begin analysis without getting a clear picture of the extract as a whole. Upon your second reading underline and annotate key words an...
SS
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It is given that z = 3i(7-i)(i+1). Show that z can be written in the form 24i - k. State the integer k.

z = 3i(7-i)(i+1)= 3i(7i-i+7-i 2 )= 3i(6i+8)= 18i 2 +24 (1 method mark)= 24i-18 (1 method mark)k=18 (1 answer mark)
DT
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