1 / 12

Chemistry Daily 10’s

Chemistry Daily 10’s. Week 12. 1. 1. In a chemical reaction a. the mass of the reactants equals the mass of the products. b. the mass of the products is greater than the mass of reactants. c. the number of atoms in the reactants and products must change.

herman
Download Presentation

Chemistry Daily 10’s

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Chemistry Daily 10’s Week 12

  2. 1 1. In a chemical reaction a. the mass of the reactants equals the mass of the products. b. the mass of the products is greater than the mass of reactants. c. the number of atoms in the reactants and products must change. d. energy as heat must be added to the reactants.

  3. 2. In writing a chemical equation that produces hydrogen gas, the correct representation of hydrogen gas is a. H. b. 2H. c. H2. d. OH.

  4. 2 1. Which of the following is a formula equation for the formation of carbon dioxide from carbon and oxygen? a. Carbon plus oxygen yields carbon dioxide. b. C + O2CO2 c. CO2C + O2 d. 2C + O CO2

  5. 2. A chemical formula written over the arrow in a chemical equation signifies a. a by-product. b. the formation of a gas. c. a catalyst for the reaction. d. an impurity.

  6. 3 1. Which coefficients correctly balance the formula equation NH4NO2(s)N2(g) + H2O(l)? a. 1, 2, 2 b. 1, 1, 2 c. 2, 1, 1 d. 2, 2, 2

  7. 2. In what kind of reaction does one element replace a similar element in a compound? a. displacement reaction b. combustion c. decomposition reaction d. ionic reaction

  8. 4 1. In what kind of reaction do the ions of two compounds exchange places in aqueous solution to form two new compounds? a. synthesis reaction b. double-displacement reaction c. decomposition reaction d. combustion reaction

  9. 2. The reaction represented by the equation 2KClO3(s) 2KCl(s) + 3O2(g) is a(n) a. synthesis reaction. b. decomposition reaction. c. combustion reaction. d. ionic reaction.

  10. 5 1. If chlorine gas is produced by halogen replacement, the other halogen in the reaction must be a. bromine. b. iodine. c. astatine. d. fluorine.

  11. 2. Which reaction does not occur? a. 2HF(aq) + Cl2(g) F2(g) + 2HCl(aq) b. 2Na(s) + ZnF2(aq) 2NaF(aq) + Zn(s) c. Fe(s) + CuCl2(aq) FeCl2(aq) + Cu(s) d. 2HCl(aq) + Mg(s) MgCl2(aq) + H2(g)

  12. Answers & Standards • 1.1 – a – sc2b • 1.2 – c – sc2a • 2.1 - b – sc2a • 2.2 - c – sc2a • 3.1 - b – sc2a • 3.2 - a – sc2a • 4.1 - b – sc2a • 4.2 - b – sc2a • 5.1 - d – sc2a • 5.2 - a – sc2a

More Related