The correct answer is powerful weapon
Sarin gas is a highly toxic gas, belonging to the group of organo-phosphorous, whose molecular formula is C4H10PFO2. It was discovered accidentally in 1936 by Gerhard Scharader, a German chemist, during a synthesis of pesticides. This gas is found in liquid or vapor form, has a sweet odor. Its melting point is -57 ° C, boiling point 147 ° C and density 1.089 g / mL. As it is a dangerous gas, there is no disclosure of its synthesis, because if this happens it can be manufactured and used inappropriately. The phosphoric acid (H3PO4) present in the Sarin gas molecule and the temperature, are factors that accelerate the reaction of the gas, causing it to become fast.
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Explanation:
Inca's: They built a system of roads and bridges across the roughest terrains of the Andes. The Incas developed superb architecture and engineering techniques without the use of the wheel and modern tools. The Incas did not have a written language but had an accounting system. The quipu was a collection of colored strings of alpaca, llama or cotton threads used to record accounting information in the form of knots.
Maya: Maya Engineers created aqueducts which used water pressure technology. The Maya developed the only complete writing system in Mesoamerica.
Aztec: They perfected the technique of creating artificial islands called Chinampas. They constructed a double aqueduct to bring fresh water to Tenochtitlan.
The correct answer to this open question is the following.
Although the question does not have any further references or attachments, we can say that the sectional conflict was a combination of an irrepressible conflict with the work of bungling politicians, fanatics, and agitators.
Before the Civil War, there were many incidents, events, and decisions that create more separation in the views of the northerners and southerners. In the North, the idea of abolitionism was supported by most states, while in the South, slavery was an important part of the economy. Indeed, southern states depended on slaves to produce the crops in large plantations. These crops had to be exported to Europe.
The Missouri Compromise or the Kansas-Nebraska Act was the product of different points of view from legislators trying to fix things until the problems too many that made seven states seceded from the Union, and later, the beginning of the Civil War.
In music, neumes are written on a 4-line staff, both on the lines and spaces, and they were used in Western & Eastern musical notation prior to the invention of the 5-line staff notation. hope this help
