Ayuda con la tarea de química
El solucionador de problemas de química de QuetionAI es una herramienta de tutoría de química para escuelas secundarias que puede resumir reacciones y ecuaciones químicas clave para los usuarios en tiempo real y tiene un potente sistema de aprendizaje para que incluso los estudiantes con una base débil puedan dominar la química fácilmente..
Ya no tendrás que preocuparte por las propiedades elementales de la tabla periódica. Aquí podrás acceder fácilmente a las reacciones químicas y principios de reacción correspondientes a cada elemento. Deducir la estructura original de moléculas y átomos a partir de los fenómenos macroscópicos que se pueden observar es una técnica de investigación química que siempre hemos defendido.
- 4. What does it mean for a solution to become supersaturated? This is when a solvent has dissolved a solute, but the limit of how much can be dissolved has not been reached yet. E This is when a solvent has no solute in it. E This is when a solvent has more solute dissolved in it than under normal conditions. E This is when a solvent has the maximum amount of solute dissolved in it.
- 8. What coefficients will balance the following equation? underline ( )Al_(2)O_(3)+underline ( )F_(2)arrow underline ( )AlF_(3)+underline ( )O_(2) a. 1,6,43 b. 1,2,1,3 C. 2,6,43 d. 2,12,86 9. Iron and Dioxygen gas react to form Iron (III) oxide. Which of the following equations correctly balances the reaction described? a. Fe+O_(2)arrow Fe_(2)O_(3) b. 4Fe+3O_(2)arrow 2Fe_(2)O_(3) C. Fe_(2)+O_(3)arrow Fe_(2)O_(3) d. 2Fe+3Oarrow Fe_(2)O_(3) 10. During a lab experiment, you observe several signs that a reaction has occurred. Which of the following is a sign that a chemical reaction has occurred? (Choose THREE correct answers) a. Gas was produced and bubbled out of the beaker b. The reactants were both liquid C. The beaker felt cold to the touch d. Formation of a yellow solid from two clear solutions 11. Aluminum chloride and Beryllium are produced when Aluminum is placed in Beryllium chloride. What is the balanced equation for this reaction? a. 2Al+6BeCl_(2)arrow 2AlCl_(3)+3Be b 2Al+3BeCl_(2)arrow 2AlCl_(3)+3Be C. Al+2BeClarrow AlCl_(2)+2Be Be+AlClarrow Al+BeCl 12. Which balanced equation represents a single replacement reaction? a. Mg+2AgNO_(3)arrow Mg(NO_(3))_(2)+2Ag b MgCl_(2)+2AgNO_(3)arrow 2AgCl+Mg(NO_(3))_(2) 2Mg+O_(2)arrow 2MgO MgCO_(3)arrow MgO+CO_(2) 13. Which of the following explanations justifies your selection for Question #13? a. one element replaced another in a compound, forming a new element and a new compound. b. two compounds switched elements, forming two new compounds. C. a single compound broke down into two or more simpler substances. d. two or more reactants combined to form a single product. 14. A balanced chemical equation reflects the idea that - (Choose TWO correct answers) a. the mass of the products is equal to the mass of the reactants. b. the number of atoms of each element is the same on both sides of the equation C. the mass of the products is greater than the mass of the reactants. d. the number of atoms of each element is different on both sides of the equation
- Which of the following has a molar mass of 110.984 ? CaCl_(2) K_(2)O LiNO_(3) NaCl
- 2. Which unit listed below is used to measure solution concentration in chemistry? electronegativity E E molarity E solubility E viscosity
- 2CH_(2)+3O_(2)arrow 2CO_(2)+2H_(2)O 1. Given the balanced chemical reaction above, which represents the reactants of the chemical reaction? a. CO_(2) and H_(2)O b. CH_(2)andO_(2) C. CH_(2)andH_(2)O d. CO_(2) and O_(2) 2. The chemical equation above is an example of a a. combustion reaction b. double replacement reaction C. decomposition reaction d. synthesis reaction 3. Given the balanced chemical reaction above, which represents the products of the chemical reaction? a. CO_(2) and O_(2) b. CH_(2) and H_(2)O C. CO_(2) and H_(2)O d. CH_(2) and O_(2) 4. Determine the total number of atoms on the reactant side of the reaction. a. 9 b. 12 C. 10 d. 5 5. Determine the total amount of oxygen atoms present on the product side of the reaction. a. 3 b. 5 C. 6 d. 4 6. What is the coefficient for water when balanced? underline ( )As(OH)_(3)+underline ( )H_(2)SO_(4)arrow underline ( )As_(2)(SO_(4))_(3)+underline ( )H_(2)O a. 1 b. 2 C. 4 d. 6 7. Classify the following reaction: 2Al+3Br_(2)arrow 2AlBr_(3) a. decomposition b. single replacement C. combustion d. synthesis
