(Originais Teachy 2023) - Question Very Easy of Chemistry

A chemical equation is a mathematical equation that represents an equality: all atoms and their quantities that appear in the reactants must also be present in the products. Considering a chemical equation and its corresponding equilibrium constant, it can be correctly stated that, by multiplying all its coefficients by 2, the equilibrium constant associated with this new equation will be

Consider that a group of students conducted an experiment in the Chemistry laboratory by mixing 10 grams of salt (sodium chloride) in a cup containing 200 mL of water. After the mixture reached homogeneity, we call this mixture a solution. Calculate the concentration in g/L of this solution and identify which of the alternatives below best describes the relationship between solute, solvent, and concentration in the solution?

Organic salts are compounds derived from the reaction of an inorganic base with a carboxylic acid. These compounds have distinct characteristics from inorganic salts, such as solubility in organic solvents and soap and detergent properties. A classic example of an organic salt is sodium acetate, which can be obtained by the reaction of acetic acid with sodium hydroxide. Given the formula of acetic acid (CH3COOH), identify the inorganic base that, when reacting with acetic acid, forms sodium acetate. This reaction is an example of:

One of the most fascinating aspects of Chemistry is the ability to transform and exist in different states of aggregation, depending on temperature and pressure conditions. The phase diagram is a powerful tool that helps us visualize and understand these transitions. Consider a system with a pure substance that can exist in the solid, liquid, and gaseous states. Based on the provided phase diagram, answer the following questions: 1) Identify the triple point and explain its importance in the study of phase equilibria. 2) Describe the anomalous behavior of water based on its phase diagram and discuss the biological and environmental implications of this phenomenon. 3) Select a point on the diagram and justify, based on the phase equilibrium lines, in which state the substance would be if subjected to those temperature and pressure conditions.