Chemistry Homework Assistance

QuestionAI's chemistry problem solver is a middle school chemistry tutoring tool that summarises key chemical reactions and equations in real-time, featuring a robust learning system to empower even those with a weak foundation in chemistry.

You needn't fret over the elemental properties of the periodic table anymore. Here, you can effortlessly access chemical reactions and reaction principles corresponding to each element. Deductive reasoning from microscopic phenomena to discern the original structure of molecules and atoms is a research technique we staunchly champion.

Figure 3 shows the arrangement of atoms in the three states of matter. Figure 3 A B C 0 1 3 What state of matter is represented by state C in Figure 3? Tick (v) one box. Gas square Liquid square Solid square

5. The following equations represent chemical reactions. Chemical Reactions Which equation shows . that the total mass during a chemical reaction stays the same? A. 1 B. 2 C. 3 D. 4

Across 3. Separates metals from nonmetals 6. How the Periodic Table was first arranged 9. Made into wire 11. Where the alkaline earth metals are located 13. Nonmetal that is grouped with the metals 15. The metal that is grouped with the metalloids 17. What results when elements are arranged in order of increasing atomic number 18. Elements that both the s and p sublevels are completely filled 19. The elements in the s and p blocks 20. The name for the elements who have a configuration that end in s Down 1. 2nd group, 4th period 2. Horizontal row

Modeling Energy Answer the following questions by writing your response in the space provided or by underlining or circling the correct answer choice(s). 1. If the chemical reaction AB+CDarrow AD+BC releases heat, what is true of the chemical potential energy of the reactants and products? (A.) The potential energy of the reactants is higher than the potential energy of the products. B. The potential energy of the reactants is lower than the potential energy of the products. C. The potential energy of the reactants is the same as the potential energy of the products. D. Neither the reactants nor the products have potential energy. 2. How do endothermic reactions impact the overall kinetic energy of the molecules? Select all that apply. A. Energy is absorbed during an endothermic reaction. B. Energy is released during an endothermic reaction. C. An endothermic reaction increases the overall kinetic energy of the molecules. D. An endothermic reaction reduces the overall kinetic energy of the

1. A student investigated the reaction between magnesium and excess hydrochloric acid Figure 1 shows the apparatus. Figure 1 This is the method used. 1. Pour 50cm^3 of hydrochloric acid into a conical flask. 2. Add a piece of magnesium 3. Insert stopper and delivery tube and start a timer. 4. Collect the gas produced in a gas syringe 5. Record the volume of gas produced every 20 seconds for 2 minutes. 6. Repeat steps 1 to 5 with higher concentrations of hydrochloric acid. (a) Give the independent variable and one control variable in this investigation. Independent variable __