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Home Question Bank Chemistry Archive 2024 November 06

Chemistry Questions from Nov 06,2024

Browse the Chemistry Q&A Archive for Nov 06,2024, featuring a collection of homework questions and answers from this day. Find detailed solutions to enhance your understanding.

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Hallar la molalidad de una solución que contiene 0,5 moles de Kcl disueltos en 250 mi de agua. \( \mathrm{R}=2 \mathrm{~m} \) El gas natural esta formado por una mezcla de compuesto carbono - hidrogeno llamado hidrocarburo, uno de los cuales es el metano \( \mathrm{CH}_{4} \). Al quemar o hacer una combustión el metano arde con el oxigeno y produce gas carbónico y vapor de agua y energía. 1. Un químico industrial necesita preparar 5000 gramos de blanqueador el escogío, hipoclorito de sodio. Cuantos gramos de hidróxido de sodio y de ácido hipocloroso se necesitarán, sabiendo que la pureza del hidróxido de sodio es del \( 90 \% \). (d) Tulis satu persamaan reputan bagi U-238 kepada Ra-226. Write the decay equation of U-238 to Ra-226. The half-life of chromium-49 is approximately 42.3 minutes. Step 3 of 3 : How much of a 4 gram sample of chromium-49 would remain after 69 minutes? Round to three decimal places. The half-life of chromium-49 is approximately 42.3 minutes. Step 2 of 3 : How much of a 4 gram sample of chromium- 49 would remain after 5 minutes? Round to three decimal places. 1. При восстоновлении утлем оксидо \( \mathrm{Fe}_{2} \mathrm{O}_{3} \) полуиили 28 г Fe . Сколько громмов оксидо было өзято? \( \mathrm{Fe}_{2} \mathrm{O}_{3}+\mathrm{C}=\mathrm{CO}_{2}+\mathrm{Fe} \) Acido fostorico 16. Indica l'atomo con raggio minore. \( \begin{array}{llll}\text { A } \mathrm{Be} & \mathrm{B} \mathrm{Ca} & \mathrm{C} \mathrm{Mg} & \text { D } \mathrm{Ba}\end{array} \) A tank of nitrous oxide \( \left(\mathrm{N}_{2} \mathrm{O}\right) \) used as an anesthetic has a pressure of 48 psi . What is that pressure in atmospheres?
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