Compostos iônicos como cloreto de sódio (nacl), óxido de sódio (na2o) e óxido de alumínio (al2o3) são sólidos cristalinos formados a partir de ligações iônicas que possuem elevados pontos de fusão e ebulição. além das ligações iônicas, os elementos químicos realizam ligações covalentes e metálicas. elaborado pelo professor. nesse contexto, leia as afirmativas a seguir. i - a ligação iônica ocorre entre um não metal e outro não metal. ii - na ligação covalente, há o compartilhamento de elétrons. iii - as moléculas são formadas a partir de ligações metálicas. é correto apenas o que se afirma em: alternativas alternativa 1: i. alternativa 2: ii. alternativa 3: iii. alternativa 4: ii e iii. alternativa 5: i, ii e iii.

An aqueous solution of potassium hydroxide is standardized by titration with a 0.194 m solution of hydrobromic acid. if 25.2 ml of base are required to neutralize 24.2 ml of the acid, what is the molarity of the potassium hydroxide solution? m potassium hydroxide

Juju.01) 5 geologic events a group of students designed an experiment in an ice rink to represent the solar system. the steps of the experiment are listed below. 5: geologic events 1. choose a student to represent the sun. the planets are represented by two tennis balls. 2. ask the student to hold the tennis balls in each palm and spin on the ice with arms stretched out. 3. ask the student to draw in the arms after about 10 spins. 4. observe the student's arms rotate faster when they are closer to the body. 05 geologic events enors) the experiment most likely demonstrates that (2 points) 07 discussion-based sessment/module planets exert gravitational force on the sun the sun exerts gravitational force on the planets 3.07 discussion-based ssessment speed of a planet depends on its distance from the sun new version available! (3.0.119) get it now submit 18.07: module exam description

How many liters of oxygen gas, at standardtemperature and pressure, will react with 35.8 grams ofiron metal? 4 fe (s) + 3 o2 (g) → 2 fe2o3 (s)