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Chemistry: Post your doubts here!
Delta H = Bonds broken - Bonds formed You're already told the value of Delta H, so use that as a starting point. Now work out the total energy for bonds broken and the total energy for bonds formed. Bonds broken:- 1 x C=C 4 x C-H 1 x H-F Bonds formed :- 1 x C-F 5 x C-H 1 x C-C Bonds broken... -
Chemistry: Post your doubts here!
X will be the most soluble spot in both solvents, since it's at the maximum values on both axes. To find the most soluble amino acid besides this, you need to consider the spots that went the farthest on their axes as well as any spots that are on the straight line. The spots that went the... -
Chemistry: Post your doubts here!
Cis/Trans isomerism is basically just geometrical isomerism. It does not only apply to alkenes only, but to cycloalkanes too. They both have the formula CnH2n. Try to think of the cycloalkane, as a ring placed flat on a surface. There are two planes, the top and the bottom one. So when you... -
Chemistry: Post your doubts here!
There's two axes, solvent 1 and solvent 2. If the points move across the x axis, they have separated from solvent 2. If the points move across the y axis, they have been separated from solvent 1. It's asking for the "two" amino acids, that did not separate from solvent 1. Which means these... -
Chemistry: Post your doubts here!
Look at the groups in which Nitrogen and Sulfur reside. Nitrogen is in group 5 and Sulfur in group 6. That means Nitrogen has 5 electrons in its outer-shell, and Sulfur, 6. The number of bonds an atom can form is, No of bonds = Full valence shell - Number of valence electrons For example... -
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Chemistry: Post your doubts here!
No problem at all, Happy I could help! (y) -
Chemistry: Post your doubts here!
A few key things to note, the gas volumes were measured at 298K and 100 kPa. These are standard conditions. What this means is that the products will have H2O as a liquid. So you can ignore its volume. CxHy + O2 -----> CO2 + zH2O First thing you need to know, x moles of C on the left will give... -
Chemistry: Post your doubts here!
1) Use the density and volume to find the mass. Mass of ice = 1.00 gcm-3 * 1.00 cm3 = 1.00 g Moles of ice ( ice is frozen water aka H2O ) = 1/18 = 0.0556 moles It says there in bracket, the volume 1 mol of gas occupies at 298K is 24dm^3. So 0.0556 moles will give 1.33 dm^3. This is at 298 K... -
Chemistry: Post your doubts here!
CN- acts as the catalyst, NaCN is just there as a provider. NaCN ----> Na + and CN- -
Chemistry Help!
Electronic configuration of V ---> 1s2.2s2.2p6.3s2.3p6.4s2.3d5 During ionization, 4s is repelled to a higher level than 3d, making it take priority during ionization. When you ionize Vanadium to [V]3+, you remove 3 electrons starting with 2 from the 4s orbital and the remaining electron from... -
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Helping people isn't inconvenient ^_^
Helping people isn't inconvenient ^_^- Xylferion
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Physics: Post your doubts here!
you've got 3 readings... and those readings are not proper either. Like I've already said twice, have your values differ by 1.00 from each other. -
Physics: Post your doubts here!
I can for one confirm that, your values need not belong to a single value like 7. The ms even says your times should be between 6 and 20. This has also been the case for all the stopwatch based experiments I've done. They give you a large range because you're not expected to release the object... -
Physics: Post your doubts here!
All your releases on the swings won't be accurate, the whole point of releasing them at different times is to get an accurate value. Don't make it extreme as in 16 seconds for 10 swings and then 42 seconds for the other, between 6 and 9 is not extreme. -
Physics: Post your doubts here!
Sorry they wanted the absolute uncertainty not the percentage uncertainty to be between 0.2 and 0.5, so your times would have to be within 1 s of each of other. I changed the values, have a look at them. -
Physics: Post your doubts here!
Alright here's an example. I'll be using the ranges specified in the ms to prove that your uncertainty must be between 0.2<_<0.5 Let's say our times were: 6.72, 7.41, 8.23, 9.16, 7.34 First find the mean value. That is 6.72, 7.41, 8.23, 9.16, 7.34 / 5 ======> 7.772 Now find the absolute... -
Physics: Post your doubts here!
Keyword is "estimate" not "calculate", you need to have several readings. Max - Min / Number of readings = absolute uncertainty Find the mean value for t as well. Absolute uncertainty / Mean value * 100 = Percentage uncertainty.