Select all that apply. In the PhET Beer's Law Lab "Beer's Law" simulation, which experiment parameters can be changed? wavelength of light solution (ionic compound or dye) temperature of the experiment how full the cuvet is (e.g. half-full or completely full) rate of evaporation path length (how wide the cell is). where the detector is positioned concentration of solution

Saved Normal BIIIU fxl Ix Actual mass used in solution prep (g) Volume solution prepared Measured conductivity (uS/cm) Substance 0.1 g Naci 0.1003 100 mL 1149 0.1 g Nal 0.10 100 ml 419 Calculate the mass of Nal that would be necessary to yield the same conductivity as the NaCl solution. Clearly show these calculations in your lab notebook. Saved T BII U X X + fr Normal

Which answer choice best describes a heterogeneous mixture?     A solution with different sized particles A solution that exhibits the Tyndall effect Mixtures which have a non-uniform composition Mixtures which have a uniform composition

a) b) as per guidelines you can answer these two question because they are bits of the same question

Just needing help on part b please.

I need help with this question please! Use dimensional analysis please!?

Effect of Particle Size on the Rate of Dissolving Time required for all NaCl to dissolve Sample Results after 2 minutes shaking Do you think the size of the crystal makes a difference in how fast the salt dissolves? Explain why the differences you observed and why they happened. Effect of Temperature on the Rate of Dissolving Time required for all NaCl to dissolve Sample Observations Do you think the temperature of the water makes a difference in the rate at which the NaCl dissolves? Explain why the differences you observed and why they happened. Page 3 of 6

DATA AND CALCULATIONS Show all calculations neatly on an attached sheet. Trial 1 Trial 2 Trial 3 70.6849. 68.0749 2.61g 23.25ML O.65ML 22.6mL Mass of flask + vinegar Mass of empty flask Mass of vinegar used Final buret reading Initial buret reading Volume of NaOH used Moles of NaOH used 0.00226 mol Moles of açetic acid titrated Mass of acetic acid titrated Mass % acetic acid in vinegar 5.0%

Question 5 In Step 8 (see below, as well as in the presentation), three different slimes were prepared by adding different amounts of borax solution. Which of the following statements is/are correct? Step 8: Prepare the following slimes and evaluate their properties Sample 1 3 PVA solution 40 mL 40 mL 40 mL Borax solution 10 mL 5 mL 1 mL Deionized water O mL 5 mL 9 mL Breaking length Bounce height 30cm 70cm NA 5cm 10cm NA O The more borax we add, the more rigid the slime will become. O The less borax we add, the less elastic the slime will become. O The change in its properties is due to the added amount of water which will affect the structure of the slime. O The water is added in order to have the same final volume of reactants.