9. Which expression could be a unit for the measurement of rate of recation? a. mol²/L² b. mol/L c. L.min/mol d. mol/L.s e. S-1 10. Two test tubes, A and B, contain samples of zinc that are equal in mass and have the same surface area. Equal concentrations and amounts of sulfuric acid are added to the test tubes. A catalyst is added to test tube A. Why must the zinc samples have identical surface areas? a. Test tube B is the control b. Surface area is another factor that could affect the rate of the reaction C. Test tube A is the control d. Both (a) and (b) are correct e. Both (b) and (c) are correct
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- 3. Corev was synthesizing a chemical in the laboratory. He used different purification techniques to try to obtain a pure compound. The melting point of the pure compound is 65 degrees. When he tested his compound in the lab the melting point he obtained was 62-68 degrees. Is the product he synthesized pure? 4A company was low on copper metal and decided to use some chemical additives just this once to some copper wiring they were installing in a house. How will this impact the conductivity of the wiring?A gallon of methyl ethyl ketone (MEK) is spilled in a room which is 20'x15'x10'. Given static conditions, what is the concentration in the room? A. 12,237 ppm B. 12, 327 ppm C. 13,227 ppmC(s) + CO2(g) → 2C0(g) AH = 172 kJxmol·1 In a suitable vessel, pieces of graphite are mixed with carbon dioxide gas at 1.00 atm and 1000 K. Which of the following changes will result in an increase in reaction rate? a. decrease size of graphite pieces b. decrease temperature c. decrease partial pressure of CO(g) d. decrease partial pressure of CO2(g)
- D. Absence of Tyndall effect phenomenon. 10. Identify the CORRECT statement regarding the chemisorption. A. Multilayer adsorption. B. Heat of adsorption is < 40 kJ/mol. C. Adsorption can occur at high temperature. D. Molecules of gas are held by weak Van der Waals forces. 3 I 5 Q + Page T.50 hpDoes the amount of activated carbon used in the purification process important? O Yes. Since activated carbon adsorbs all compounds, the amount used should be increased, as this may result in a higher recovery of the desired compound. O No. Since activated carbon adsorbs all compounds to some degree, the amount used should be reduced, as this may result in a higher recovery of the desired compound. O Yes. Since activated carbon adsorbs all compounds to some degree, the amount used should be reduced, as this may result in a lower recovery of the desired compound. O No. Since activated carbon adsorbs all compounds, the amount used is not important, as this does not affect in the recovery of the desired compound.PART 3- LABORATORY EQUIPMENT EQUIPMENT NAME FUNCTION To hold test tubes. Attaches to a retort stand to support glassware being heated. To pour liquid from a large container into a small container. To provide a flame during an experiment. ones To light the Bunsen burner. To attach test tubes to a retort stand. To clean substances out of a test tube. To hold a hot crucible or flask. To hold a hot test tube. To place on the lab bench to prevent burning or to use with ring clamp. To transfer small amounts of liquid. To grow bacteria or contain small experiments. To hold liquids. To measure liquids. To contain experiments (a stopper can be used to close the flask). To hold a hot beaker. To perform an experiment with a different substance in each well. To hold chemicals and perform experiments in. To scoop and transfer small amounts of substances, To stir during experiments that involve mixing or dissolving.
- a. Rate = k [A] [B] b. Rate = k [B]² Rate = k [A] [B] Rate = k [A]² Rate = k [A] [B]2 c. d. e. 18. Which solute is not soluble in the given solvent for the solute-solvent pair? Solute Solvent water 1 2 3 HO a. 4 b. 3 c. 1 d. 2 O Br OH 1.030 M/S 5 water hexane hexaneWhich of the following is TRUE? A. The higher the concentration of reactants, the slower the formation of products. B. For liquid reactants, higher pressure leads to faster chemical reactions. C. Products will be formed faster if reactants have smaller particle sizes. D. For solid reactants, lower pressure leads to faster chemical reactions.Ssolve asap like is ready pls pls solve fast
- Sodium chlorate crystals are easy to grow in the shape of cubes by allowing a solution of water and sodium chlorate to evaporate slowly. a. If V is the volume of such a cube with side length x, calculate dV/dx when x = 3 mm and explain its meaning (be specific). b. Show that the rate of change of the volume of a cube with respect to its edge length is equal to half the surface area of the cube.Write a balanced equation for the overall reaction. Express your answer as a chemical equation. Identify all of the phases in your answer. Calculate E∘cell�cell∘. Express your answer to two decimal places.Define Extraction in chemistry ?