Which of the following is an exothermic reaction?

A) tea dissolving in water

B) an explosion

C) sugar dissolving in water

D) the cooling of an ice pack

How to write generic word equation and a chemical equation for the reaction that occurs when an anhydrous salt is placed in water (hydrated) ?

What does the law of convservation of matter show?

What is the solvent and solute in soy sauce

According to the solubility rules, which compound is insoluble in water?

Suppose that aqueous solutions of barium nitrate and potassium carbonate are mixed. What is the name of the compound or vomphnds that precipitate?

Assuming constant pressure, rank these reactions from most energy released by the system to most energy absorbed by the system, based on the following descriptions: A. Surroundings get colder and the system decreases in volume. B.

Zircon is a mineral with the empirical formula ZrSiO4. If all the zirconium is 90Zr, all the silicon is 28Si, and all the oxygen is 16O, what mass of oxygen is present in 10. g of zircon?

Which property below is not a general property of metals: A. Ductile C. Malleable B. Poor conductor of heat D. High luster

Calculate the number of particles (atoms or molecules) of the following: 1. How many molecules are there in 24 grams of FeF3? 2. How many molecules are there in 450 grams of Na2SO4? 3. How many grams are there in 2.3 x 1024 atoms of silver?

Write a balanced equation for the decomposition reaction described, using the smallest possible integer coefficients. When calcium carbonate decomposes, calcium oxide and carbon dioxide are formed.