Ayuda con la tarea de química
El solucionador de problemas de química de QuetionAI es una herramienta de tutoría de química para escuelas secundarias que puede resumir reacciones y ecuaciones químicas clave para los usuarios en tiempo real y tiene un potente sistema de aprendizaje para que incluso los estudiantes con una base débil puedan dominar la química fácilmente..
Ya no tendrás que preocuparte por las propiedades elementales de la tabla periódica. Aquí podrás acceder fácilmente a las reacciones químicas y principios de reacción correspondientes a cada elemento. Deducir la estructura original de moléculas y átomos a partir de los fenómenos macroscópicos que se pueden observar es una técnica de investigación química que siempre hemos defendido.
- Consider the reaction: CH_(4)+2O_(2)arrow CO_(2)+2H_(2)O Exactly 14.5 moles of CO_(2) are produced from burning how many moles of CH_(4) in excess oxygen? 14.5 moles 65.2 moles 29.0 moles 34.5 moles
- 3. Which of the following items should be in case of an emergency? Eyewash station b) First aid kit c) Fire extinguisher d) All of the above 4. When heating substances in the lab, which of the following precautions should be taken? a) Always heat substances in a closed container b) Keep flammable materials away from heat sources c) Do not pay attention to the heat source d) You can heat anything without checking its safety guidelines
- 1. Why is it important to wear proper lab attire? a) To look stylish in the lab b) To protect yourself from chemicals, flames, and other hazards c) To make a good impression on your lab partners d) None of the above 2. What does MSDS stand for, and what has it been replaced with? Medical Safety Data Sheet it has been replaced with Safety Data Sheet (SDS) b) Material Safety Data Sheet; it has been replaced with Safety Data Sheet (SDS) c) Manual Safety Data Sheet; it has been replaced with Safety Data Sheet (SDS) d) Material Safety Document Sheet; it has been replaced with Standard Data Sheet (SDS)
- Q.8. The amount of matter __ during a phase change. a) increases b) stays the same c) decreases Q.9. A substance has a melting point of -10^circ C and a boiling point of 60^circ C What will be state of this substance at -27^circ C a) Solid b) Liquid c) Gas Q.10. Which of the following phase changes requires the subtraction of heat energy? a) Melting b) Vaporization c) Sublimation d) Condensation
- Finthe Blank Spoints A.sample of neongas contains 1.50 mol of atoms. a. How many atoms are In this sample? hypeyouranswer... times 10^23 decimal places) b. What is the mass of this sample? bypeyouranswer... places) C. What Is the volume of this sample at STP? type your answer. typeyouranswer (1 decimal plac d. What is the density of this gas at STP? type your answer. g/1.(3 decimal places)
