Agood reaction that gives off a bright light occurs when magnesium is burned in a bunsen burner. as a result, it binds with oxygen in the air. what is the balanced chemical equation for this reaction?

a)
mg + o → mgo

b)
mg + o2 → mgo2

c)
2mg + o → mg2o

d)
2mg + o2 → 2mgo

Um vetor representa um deslocamento cujo módulo é 20 m. se v faz um ângulo de 60 graus com a horizontal, qual é o valor das componentes horizontal e vertical deste vetor?

With i really need the correct answer!

An electric current is flowing through the cord below.what will happen to this current if a magnet is brought near the cord? a. the electric current will stop flowing. b. it will exert a force on the voltage. c. the resistance of the wire will decrease. d. it will exert a force on the electric current.