Fingerprint region is the region on the right hand side of the spectrum with so many complicated peaks and they are completely different for every compound so can be used to distinguish two compounds like butan-1-ol and butan-2-ol. They will have similar pattern on the left but completely different on the right.
So the two compounds in this question will have different fingerprint region. The answer is A because the C=O peak is different in aldehyde and ketone I guess?
WAIT don't they have same molecular ion peak in mass spectra? Are you sure it's not D Posted from TSR Mobile
if they both have an Mr of 58, why is their molecular ion peak different? is it because it is talking about the FRAGMENTS that they produce? in that case, I understand, but the multiple choice option says 'different MOLECULAR ion peaks at different m/e ratios' so surely, if they're talking about FRAGMENTS they wouldnt incude the word MOLECULAR ION PEAK? as this implies its the total Mr of the molecules, the peak furthest to the right on the x-axis...
if they both have an Mr of 58, why is their molecular ion peak different? is it because it is talking about the FRAGMENTS that they produce? in that case, I understand, but the multiple choice option says 'different MOLECULAR ion peaks at different m/e ratios' so surely, if they're talking about FRAGMENTS they wouldnt incude the word MOLECULAR ION PEAK? as this implies its the total Mr of the molecules, the peak furthest to the right on the x-axis...
If the molecule is polar. That is when there's an electronegativity difference and when the centres of positive charge and negative charge do not coincide.
Thank you! Also, how is boiling pt and melting pt different ??? on a past paper it says graphite has a high melting pt because of the covalent bonds. but iodine has a low boiling point because of vdw forces... so does boiling pt depend on intermolecular forces and melting pt depend on chemical bonds?
Thank you! Also, how is boiling pt and melting pt different ??? on a past paper it says graphite has a high melting pt because of the covalent bonds. but iodine has a low boiling point because of vdw forces... so does boiling pt depend on intermolecular forces and melting pt depend on chemical bonds?
They aren't any different. They depend on the forces of attraction between atoms/molecule /ions involved. Take silicon. The atoms are bonded covalently to neighbouring atoms so melting point is very high, and so is the boiling point
is dipole dipole interactions the same as permanent dipole interactions? because I know that ketones have permanent dipole interactions and CH3Cl, but the overall ketone molecule is not polar
they aren't any different. They depend on the forces of attraction between atoms/molecule /ions involved. Take silicon. The atoms are bonded covalently to neighbouring atoms so melting point is very high, and so is the boiling point
One Ca(OH)2 consists of three ions; Ca2+, OH- and another OH-. So in a mole of Ca(OH)2 there are three moles of ions. How many electrons are there in one ion of OH-? 8+1 for oxygen and hydrogen, and another for the negative charge so 10. So in a mole of OH- ion there are ten moles of electrons
Hi tungsten is extracted using hydrogen. It can be extracted from its oxides with C however the product will be impure and brittle. WO + 3H2 ----> W + 3H2O hydrogen is expensive but you get pure tungsten Hydrogen is explosive when mixed with air Occurs at temperatures 700 celcius +
Me too lol keep getting 83.. Don't the grade boundaries change each year?
83 is an A in the past papers, i'm sure. Well done yeah grade boundaries change every year, but if I get at least 88 then I know I've definitely got the 121 UMS i need. I'm actually aiming to get in the 90s but so far, no luck! I got 233 ums last year, so 7 away from an A!
NEED HELP WITH THIS: 2.4) What is the maximum mass of iron (III) chloride that can be produced from 50.0 g of Fe and 100gof chlorine gas ?2 Fe + 3 Cl2 → 2 FeCl3
NEED HELP WITH THIS: 2.4) What is the maximum mass of iron (III) chloride that can be produced from 50.0 g of Fe and 100gof chlorine gas ?2 Fe + 3 Cl2 → 2 FeCl3
Well if you look at the mole ratios what similarity will you see between Fe and FeCl3
I'll ask you a similar question So I've got 1/2 a bag of flour 1 carton of milk and 9eggs To make a cake, I need 1/2 a bag of flour, 1 carton of milk, and 2 eggs How many cakes can I make with my ingredients? hope that helps