患者，男性，45岁。两天前发生急性呼吸衰竭，紧急气管插管，行呼吸机辅助呼吸，目前肺功能仍不断恶化，给予去甲肾上腺素纠正低血压，并预防性给予青霉素抗感染。体格检查：T39℃，BP 80/50mmHg, 心率12次/分, CVP 16mmHg; 毛细血管充盈时间大于 5 秒；肢端出现凹陷性水肿、发冷、发绀, 尿量10~15ml/h。
How many moles are in 16.48 g Mg? Answer in units of mole.Molar Mass:One mole is defined as {eq}\displaystyle 6.022\ \times\ 10^{23} {/eq} atoms or molecules. Now since one atom or molecule has a unique mass due to the atomic model, each measurement of one mole will have ...
To determine the total valence electrons in a compound, we determine the number of valence electrons that each atom has, then get the sum of these values. If there is more than one atom of the element, the valence electrons of that element should be multiplied by the number of atoms....
The most expensive natural element isfrancium. Although francium occurs naturally, it decays so quickly that it cannot be collected for use. Only a few atoms of francium have been produced commercially, so if you wanted to produce 100 grams of francium, you could expect to pay a few billion...
How many molecules are in a tablet weighing 500 mg?Question:How many molecules are in a tablet weighing 500 mg?Molecules:Molecules are small particles of a substance made from two or more atoms. If the atoms come from different elements, the molecule will be called a compound. Molecules can...
Fig. 2: APT analysis on the distribution of individual atoms and composition of the as quenched Al-2.69 Zn-2.87Mg-0.95Cu alloy (at. %) after immersion in 0.1 M KCl in D2O for 3 h. a Atom maps of Al, O, Mg, Zn, Cu, and D. b One-dimensional composition analysis across th...
HHC, or hexahydrocannabinol, is a psychoactive cannabinoid that can be processed from compounds found in legal hemp plants.
Use the periodic table to enter electron configurations for In, and Zr. Write the complete electron configurations for atoms of the following elements: Sc, As, Ba. Write the full electron configurations for each of the following elements. (a) N (b) Mg (c) Ar (d) Se ...
1 A silicon chip used in an IC of microcomputer has a mass of 5.68 mg.How many silicon (Si) atoms are present in the chip?2 Calcium carbonate (CaCO3),also called calcite,is the principal mineral found in limestone,marble,chalk,and pearls.(a) Calculate the molar mass of calcium carbonat...
How many moles of chlorine are in 8.50 moles of Mg(ClO4)2? How many grams of Cl_2 are needed to produce 7.20 moles of chloroform? Calculate the volume of 22.0 moles of Cl2 at STP. Calculate the volume of 22.5 moles of Cl2 at STP. How many moles of Cl atoms are in 1.7 grams of...