October 2022 Flashcards
(21 cards)
Oxygen at pressures much greater than 1 atm is toxic to lung cells. Assume a deep-sea diver
breathes a mixture of oxygen and helium. By weight, what ratio of helium to oxygen must be
used if the diver is at an ocean depth of 50.0 m ?
less than 1
discovered helium
Ramsay & Travers
Who theorized stars collapsing into blackhole as it increases entropy
Hawking
when travelling at nlex t 80 mph, a stopped car in front causes you to suddenly skid to stop. What happened to the KE of the moving car
All of it transferred to the internal energy of the road
what are sigmatropic reaarrangements in organic reactions?
pi system does not occur
titanium crystal. Unit Cell
4.51
Caffeine
C8H10N4O2
access and predict the largest and smallest peak of a mass spectrum of two naturally occuring isotopes of hydrogen
7.8 signal intensity
temperature the speed of sound in hydrogen will be same as that of speed of sound in oxygen at 100C.
Sqrt of kRT/M
different tetrapeptides can be made (a) if the peptides contain the residues of
asparagine, proline, serine, and methionine and (b) if all 20 amino acids can be used?
256, 160,000
Most oxidiezed form of nitrogen
Nitrates (NO3-)
Oxidation number of O in Na2SO4
-2
how do two free radicals react when they encounter each other?
They unite with covalent bond formation
How to differentiate alkane alkene and alkyne?
reaction with Br2
Which of the following lipis contain a ceramide unit?
Sphingomyelins
Which of the following acidic group is present in taurine?
Sulfonic acid (-SO2OH)
color change of litmus paper when basic
blue
which among the compounds na di mo mahahanap ang C, N, H, and O in a single compound.
ascorbic acid
the diamond has a face centered cubic crystal lattice
9.95, 11.5, 16.38, 19.31, 20.21, 23.51
time to reach the pond, time to flush
2.3 days and 21 days
degree of deprotonation of the side chain of cysteine at pH 7.30, given that the
side chain –SH group has pKa = 8.20
0.126
