What is the molar mass of KBr? How much water must be evaporated from 500 ml of 1M NaOH to make it 5M? How many liters of a 0.2 m NaOH solution are needed in order to have 1.0 moles of NaOH? What is the molar mass of Ca(OH)2? What is the molar mass of C3H8? If 2.00 g...
3) 1.500 moles of KClO 135.8 g 4) 0.750 moles of NaOH 30.0 g 5) 3.40 x 10¯ 5 moles of Na 2 CO 3 3.6 x 10 -3 g Calculate the moles present in: 1) 2.00 grams of H 2 O .111 mol 2) 75.57 grams of KBr .6350 mol ...
bromoform; tris - (2,3 - dibromopropyl)phosphate; 1,1-dibromoethane; a brominated maleic anhydride-propylene glycol polyester (prepared by heating together maleic anhydride and propylene glycol, adding CC2 4 , and brominating with bromine in CC2 4 ); HBr; NH 4 Br; NaBr; KBr and bromine...
IR spectra were applied on Shimadzu FT-IR 8101 PC infrared spectrophotometers (Shimadzu, Tokyo, Japan) using KBr disks. 1H NMR spectra were run at 400 MHz, and 13C NMR spectra were run at 100 MHz in deuterated dimethyl sulfoxide (DMSO-d6). Chemical shifts are given in parts per million...
Also, according to the report of Zhu et al. (2021), the number of functional groups cannot be quantified by the FTIR determined with the KBr compressed discs technique. TGA analysis was performed on GL/OXG fibers to evaluate the impact of cross-linking on the thermal properties of the ...
Infrared (IR) spectrum was recorded in KBr using a JASCO FT/IR-400 spectrometer. Synthesis of PCL A round-bottom flask with a magnetic stirring chip was flamed and filled with nitrogen atmosphere for three times. Ethanol as an initiator and a solution of catalyst Sn(Oct)2 or Sc(OTf)3 ...
FTIR spectra (Avatar 360ESP) were obtained from a neat film cast from the chloroform copolymer solution between KBr tablets. GPC of polymers was performed in tetrahydrofuran with a Waters Associates Model ALC/GPC 244 apparatus. Mo- lecular weight and molecular weight distribution of poly- mers ...
How would you make a 2M solution of KBr? The atomic mass for K=39, Br= 79.9. Explain with steps. The molecular weight of X is 120. How much X would I need to make 500mL of a 10% solution of X ? A mole of ethanol and a mole of hemoglobin (or any o...
2.2.2傅里叶变换红外分析红外光谱通过将1mg研磨的腐殖酸样品与60mg光谱纯KBr压片, Perkin lmer1725X型傅里叶变换红外光变仪上测定,分辨率4cm -1 。 2.2.3交叉极化-魔角旋转固态 13 C核磁共振分析将约60mg固体样品装入直径4mm具KelF塞子的 ZrO 2 转子中,在BrukerDRX400型核磁共振仪测定8个腐殖酸级分的 13...
(4) with a controlled molecular weight (MW) and a polydispersity index (PDI) was prepared by chain-growth polycondensation of 4-(N-1,1,1,2,2,3,3,4,4,5,5,6,6-tridecafluorooctylamino) benzoylbenzoxazolin-2-thione (3) initiated with p-nitrobenzoyl chloride using EtMgBr as an activator...