What is a chemical reaction

The oxidation numbers of Fe and Br in the compound FeBr2

describe how would you use chromatography to show whether blue ink contains a single purple dye or a mixture of dyes

Which of these organelles produces h2o2 as a by-product?

During which process does the addition or loss of thermal energy change the arrangement of the particles? A conduction B radiation CDa change of state

How many joules of energy does it take to melt 35g of ice at 0.0c?

Initially you dissolved all, or most, of the p-aminobenzoic acid in ethanol. then you slowly added sulfuric acid. as you did this, a large amount of white solid formed. during the course of the reaction, that white solid dissolved.

How do you know if a chemical reaction has occurred?

Why must a container or system be closed for equilibrium to be established?

What is the bond angle between the hydrogen atoms in an ammonia (NH₃) molecule?

In Experiment 1, the density of pure ethanol was found to be:Question 1 options:less than 0.793 g/mL. 0.793 g/mL. 0.999 g/mL. greater than 0.999 g/mL.