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.

16) How many molecules are there in 230 grams of NH_(4)OH WKS001X012 (2000 Cavalcade Publishing (http://www .cavalcadepublishing.com) A

15) How many grams do 4.3times 10^21 molecules of UF_(6) weigh?

1) Match the Definition to the word. 1. when molecules stick to one another A hydrogen hond charged ends 2.midecules that contain oppositely 11. surface tension C.polar 3.special type of cohesion when a gas and a liquid meet causing the top D.adhesion layer of liquid to act like a thin sheet. Ecohesion 2) lonic Bonds are between __ a) Two non-metals c) Metal and Nonmetal b) Two metals d) Metalloid and Nonmetal 3) Cations are negatively charged and Anions are positively charged. a) True b) b) False 4) What subatomic particle(s) exis in the nucleus? a) Electrons b) Protons c) Neutrons d) B and C 5) Circle any of the following that CANNOT be dissolved in water; (more then one correct answer) a) Polar covalent bonds b) Oil c) Soluble Ionic bonds d) Non-polar covalent bonds 6) Hydroxide ion mixed with lead ion (2+) will form a precipitate a) True b) False 7) The amount of substance dissolved in a certain volume of a solvent is __ a) Molarity c) Density b) Concentration d) None of the above 8) The compound AgBr is. __ a)Soluble b) Insoluble 9) The compound NaOH is... __ a) Soluble b) Insoluble 10) The compound Magnesium Sulfate is __ a)Soluble b) Insoluble 11) What two new compounds form if the solutions. AgNO_(3) and NH_(4)OH, were mixed. Circle the new formed compound t would precipitate (insoluble). 12) What is the molarity of the following solution? a) 3.5 mol KCl in 355 mL of solution b) 12.3gCaF_(2) 350 mL of Solution

__ 7. What is the molar mass of Mg_(3)(PO_(4))_(2) C. 357.8g/mol d. 262.855g/mol a. 143.58g/mol b 221.8g/mol

2Al+6HClarrow Al_(2)Cl_(6)+3H_(2) Calculate the mass of hydrogen formed when 25 grams of aluminum reacts with excess hydrochloric acid. a 0.419 b 1.80 g C 2.80 g d 0.929