Gallic acid

Another candidate is N2H4BH3 (hydrazine borane, HB) solid with 15.4 wt% hydrogen capacity, which can release 5.8 wt% H2 at 140 C in 12 min [4] and can yield 11 wt% H2 at 150 °C in less than an hour after mixing with LiH, has attracted more attention and has been experimentally studied as one novel B-N-based material for hydrogen storage through different routes, such as thermal decomposition, hydrolysis, etc… [5-9]. This material can be easily prepared from a reaction of dihydrazine sulfate with

What is Calcium? The chemical element Calcium (Ca) is a malleable, ductile, soft metal. It's located in period four and group two of the periodic table. Calcium atoms have 20 electrons and 20 protons, there are two valence electrons in the outer shells. Its mass number is approximately 40.08. Calcium has four stable isotopes including 40Ca, 42Ca, 43Ca, and 44Ca; 97% of naturally occurring calcium is in the isotope 40Ca. Isotopes are atoms that have the same number of protons and electrons, but

The raw atenolol and metoprolol powder were the kind gift from Swiss Pharmaceutical Co., Ltd, Taiwan. Chemically, atenolol (free base) and metoprolol have a molecular weight of 266 and 267 (Lennernasi, et al., 1994; Gros, et al., 2006b), the melting point between 152℃ and 156.5℃ (USP, 2005). It is a relatively polar hydrophilic compound with a water solubility of 13.3 mg/mL at 25℃(Gros, et al., 2006b). The extent of ATN molecule was estimated to be 7x18.2 Å (Lennernasi, et al., 1994, Sybyl®; Fagerholm

For the Benedict’s test I used tube clamps, a grease pencil,6 test tubes, a tube rack,6 unknown substances, and Benedict’s reagent. There was a hot plate and beaker of water already set up. I started by numbering the test tubes 1-5 with the grease pencil and left one for water as the control. I turned on the hotplate and prepared the beaker of water for the bath I would need later in the experiment and let it heat up. While that was boiling I added 5mL of unknown substance 1 to test tube 1 and continued

Due to the density of the Dead Sea Water, Ocean Water, and DI Water being lower the the calculated density of the golf ball it is hypothesized that the golf ball will sink in all three water samples. This hypothesis was reach based on the ranged of the water sample desity being from .8452 g/mL to 1.005 g/mL while the density of the golf ball is 3.779 g/ mL.After completing the experiment the hypothesis was found to be incorrect. The experiment resulted in the golf ball sinking in two water samples

Analyzing the 13C NMR spectrum of the unknown sample #46, seven distinct signals were studied shown in table (2). Signal 1 had an observed peak value of 21.225 ppm and a calculated peak value11 of 20.8 ppm. Comparing with the literature ppm value5 range 5-30 ppm, signal 1 corresponds with CH3-C=O group. This signal was the second to the most upfield and shielded in the 13C NMR spectrum comparing with signal 7 because of the carbon high electron density. However, it was more downfield than signal

Sierra Ramsey Period 3 Title: what rots an apple faster? Research: By reading an article, it tells me that if I take sugar, salt, hand soap, white vinegar, and water, that one of these five ingredients will rot or make an apple shirvell up really fast. It takes up to three days to do this process, these ingredients will take an apple and they will have to sit in the ingredients for three days. You will have to keep data of those three days of which one is rotting faster or slower or which one

The Yield from an Acid-Carbonate Reaction Results Raw Data Repetition Number 1 2 3 Average Mass of Flask (g) 61.069 ± 0.001 61.529 ± 0.001 61.707 ± 0.001 61.435 ± 0.001 Mass of HCl + Flask 80.507 ± 0.001 80.970 ± 0.001 81.342 ± 0.001 80.940 ± 0.001 Mass of Watch glass (g) 17.034 ± 0.001 17.034 ± 0.001 17.034 ± 0.001 17.034 ± 0.001 Mass of watch glass with sodium carbonate (g) 18.006 ± 0.001 17.950 ± 0.001 17.968 ± 0.001 17.975 ± 0.001 Mass of Watch glass with residue (g) 17.034 ± 0.001

from casein hydrolysis and from Tween 80 and Tween 20. But in Haloferax mediterranei it show the main difference that its result that show to be as positive but is also turn out on gelatin and how gelatin and casein can able to transform into amino acids that is determine from its source like carbon and other

This experiment consisted of a simple distillation of a hexane and heptane mixture. The first, third, and fourth fraction were taken and recorded in Table-1. The first fraction temperature ranged from 29.7°C – 38.2°C. The second fraction temperature range was recorded as 40.3°C-41.7°C, but this fraction was not used. The third fraction temperature range was determined to be 41.8°C – 36.5°C. Finally, the fourth fraction temperature range was 34.5°C-27.3°C. The ranges of the temps following the second