A student wants to determine how different factors affect the rate of dissolving a solid in water. Trial Size of Particles Rate of Dissolving small 10 sec 2 medium 20 sec 3 large 30 sec What procedures can be performed on trials 2 and 3 so that the rate of dissolving is the same as trail 1? The student can decrease the temperature The student can decrease the pressure O The student can increase the pressure The student can increase the temperature

How many milliliters of a 3.9 M NaCl solution would be needed to prepare each solution? a. 35 mL of a 2.4 M solution: mL b. 170 mL of a 0.79 M solution: mL < Prev 15 of 16 M

Data Table Mass of Zn HCI Volume Tinitial Tfinal 0.55 g 100.0 mL 20.0 °C 23.1°C The density of the 6M HCI is 1.07 g/mL. Which of the following shows how to convert the volume of the solution used into grams of solution? O a. 100.0 mL x 1mL 1.07 g Ob. 1.07 g 100.0 mL 1.07 g 1ml OC. 100.0 ml x The amount of heat absorbed by the solution can be found using the equation q = m x SH x AT. It can also be written as qsolution = msolution X SHsolution X ATsolution: We can assume that the specific heat of the solution is the same as the specific heat of water which is 1.00 cal/(g °C). Data Table Mass of Zn HCI Volume T;initial Tfinal 0.55 g 100.0 mL 20.0 °C 23.1°c Which of the following shows the correct calculation of gsolution? cal "x 3.1°C g°C O a. 100.0 mL x 1.00 Ob. cal 107 grams x 1.00 g °C х 3.1°C 0.55 grams x 1.00 cal х 3.1°C g °C

Use the graph on the last page to answer questions 10, 11 and 12. At 80˚C, what mass of sodiumchloride dissolves in1.0 L of water?

What volume of a 2.00 M KCl solution is required to prepare 500 mL of a 0.100 M KCl solution? Group of answer choices 0.0400 mL 25.0 mL 2.00 mL 1.00 × 104 mL

NEED A HELP WITH THIS QUESTION 02

A chemist mixes 45.7 g of carbon tetrachloride with 98.4 g of 2-ethyltoluene and 31.1 g of thiophene. Calculate the percent by mass of each component of this solution. Round each of your answers to 3 significant digits. component carbon tetrachloride 2-ethyltoluene thiophene mass percent 0 % x10 X Ś

Q9. Using this figure, discuss the effect of temperature, pressure, and high altitude on the solubility of oxygen in water. 15 2,000 m 14 (6.600 ft) 13 12 Sea level 10 About 9 ppm at sea level and 20°C 7 About 6 ppm at 2,000 m and 30°C 40 10 20 30 Temperature (°C) Oxygen solubility (ppm)

A certain substance X has a normal freezing point of -1.1 °C and a molal freezing point depression constant K = 2.14 °C-kg-mol by dissolving some urea ((NH2),CO) i in 650. g of X. This solution freezes at -3.2 °C. Calculate the mass of urea that was dissolved. Round your answer to 2 significant digits. X $ 1 A solution is prepared

Use the solubility graph to answer the following question. Name the type of solution if 750 g of NaNO3 was placed in 600 mL of the water at 50 °C. Solubility Curves KI Solubility (g/L of solvent) 1400 1300 1200 1100- 1000 900 800 700- 600 500 400 300 200 100 0 polyunsaturated unsaturated saturated 0 supersaturated -HCI saturated with excess solute SO₂ NaNO3 -KNO₂ NHẠCH KCI -KCIO3 NaCl NH3 10 20 30 40 50 60 70 80 90 100 Temperature (°C)