3. Which of the following is the best description of a chemical reaction? O A. When molecules of a substance move slowly enough, they link together to form a crystalline structure. B. When two molecules collide with enough force, old chemical bonds are broken and new bonds form, resulting in one or more new substances. O C. When two molecules collide with enough force, they shatter into individual atoms. Later, these atoms join up in new combinations to form new substances. O D. When two atoms collide with enough force, their nuclei fuse together, forming new substances and releasing tremendous amounts of energy.

3. Which of the following is the best description of a chemical reaction? O A. When molecules of a substance move slowly enough, they link together to form a crystalline structure. B. When two molecules collide with enough force, old chemical bonds are broken and new bonds form, resulting in one or more new substances. O C. When two molecules collide with enough force, they shatter into individual atoms. Later, these atoms join up in new combinations to form new substances. O D. When two atoms collide with enough force, their nuclei fuse together, forming new substances and releasing tremendous amounts of energy.

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

See similar textbooks

Similar questions

Your friend Niko predicts that iron and silver nitrate will form when silver is placed into an iron (III) nitrate solution. Is this correct? Why or why not? Reactivity Series of Metals K Ca Na Ma Al Zn Fe Ni Sn Pb Cu Ag Au Most reactive Least reactive
A well insulated calorimeter contains 100 ml of water. 0.100 mol of solid potassium nitrate is added to the water and stirred until it has all dissolved. The water was initially at a temperature of 18.00 °C. After all the potassium nitrate has dissolved the temperature is 7.90 °C. The temperature change is caused by heat energy a. lost from the calorimeter and water to the surroundings b. absorbed in the solution process c. due to the reaction of potassium nitrate with water O d. absorbed from the surroundings into the calorimeter and water Clear my choice
"art A 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. Surroundings get hotter and the system expands in volume. C. Surroundings get hotter and the system decreases in volume. D. Surroundings get hotter and the system does not change in volume. Also assume that the magnitude of the volume and temperature changes are similar among the reactions.
In experiment #7, you observed the formation of carbon dioxide by reacting baking soda with vinegar. Why was it not possible to relight the candle? A. Carbon dioxide is heavier than air so it stays in the beaker preventing the candle from relighting. B. Carbon dioxide is lighter than air so it escaped from the beaker and the candle should have relit. C. Carbon dioxide is heavier than air so it stays in the beaker and the candle should have relit. D. Carbon dioxide is lighter than air so it escaped from the beaker preventing the candle from relighting.
A student weighs out 4.16 g of magnesium chloride and adds enough water to make 125.0 mL of solution. The student then weighs out 8.82 g of sodium phosphate and adds enough water to make 250.0 mL of solution. 25.0 mL of the magnesium chloride solution is combined with 25.0 mL of the sodium phosphate solution. a. Write a balanced equation for the reaction that occurs (remember to include phases). b. If a precipitate forms, write the name of the precipitate and calculate the theoretical yield for the precipitate. If no precipitate forms, calculate the limiting reactant. c. If the temperature of the solution decreases, is this reaction exothermic or endothermic?
Which of the following is NOT a true statement concerning what happens in all chemical reactions? A) The ways in which atoms are joined together are changed. B) New atoms are formed as products. C) The starting materials are named reactants. D) The bonds of the reactants are broken and new bonds of the products are formed. E) In a word equation representing a chemical reaction, the reactants are written on the left and the products on the right. DELL $ & 4 y f k 00 10
Determine whether each description corresponds to an endothermic reaction or an exothermic reaction. Heat is a reactant in the reaction. Exothermic The reaction mixture feels cool from the outside. Endothermic Heat is a product in the reaction. Endothermic The reaction mixture feels warm from the outside. Exothermic
True or False. Refer to the illustration showing kinetic energy distributions in reactant molecules. The kinetic energy Ea represents the average kinetic energy of the reactant molecules.
Mass of crucible and cover 12.73g 2. Mass of crucible, cover, and sample 24.11g 3. Mass of original sample 24.11- 12.73g= 11.97g 4. Mass of crucible, cover, and sample after 1st heating 20.01g 6. Mass of crucible, cover, and sample after 2nd heating (assume that this step was done) 19.98 g 7. Total mass lost by sample during heating what is the percentage of water in the sample? and what is the total mass lost by the sample?
In an exothermic chemical reaction O heat is released as the reaction proceeds. the mass of the products is greater than the mass of the reactants. the mass of the products is less than the mass of the reactants. O heat is absorbed as the reaction proceeds.
Which statement is true of a chemical change? A. Heat is always exchanged between the system and the surroundings. B. Mass is always exchanged between the system and the surroundings. C. Phase changes always accompany a reaction. D. The volume of the system always changes.
Do each of the following statements describe an endothermic or exothermic reaction? a. ΔH is a positive value. b. The energy of the products is lower than the energy of the reactants. c. Energy is released in the reaction. d. The bonds in the reactants are stronger than the bonds in the products.