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Question 19 1 pts Which of the following is not an example of the dimensions of...
Question 18 1 pts Which of the following isotopes contributes to the total molecular mass of 24.31amu? Mg-25 No answer text provided. Mg-26 O Mg-24
Question 3 2 pts A solution is made by mixing 1.42 g of methanol, CH2OH(1), with 592.mL of acetic acid, HC2H2O2(1). Calculate the concentration of the solute in the solution using the units given below. (Density of methanol = 0.792 g/mL. Density of acetic acid - 1.05 g/mL. Assume volumes mix additively.) Enter your answers in decimal form to 3 significant figures. Do not enter units since they are already provided. Molar: M molal: m mole fraction: mass percent: %(m/m)...
Table 2. Dimensions of 250g Hanging Mass Base Edge (cm) (hexagonal mass)* Base Diameter (cm) (cylindrical mass)* Height (cm) 2.3 N/A 5.7 *Fill in the column that corresponds to the mass provided in your kit. You will have EITHER a hexagonal mass or a cylindrical mass, not both. Table 3. 250 g Hanging Mass Buoyancy Data Object Weight in Air (N) Weight in Water (N) Buoyancy Force (N) Volume Displaced (mL) 250 g Hanging Mass 2.5 2.1 0.4 22 Rubber...
0/ 1 pts Question 2 During a certain titration, 35.0 mL of 0.175 M aqueous sulfuric acid was required to exactly neutralize 49.0 mL of sodium hydroxide. Determine the molarity of the base. H2SO4 (aq) + 2NaOH(aq) + 2 H2O (0) + Na2SO4 (aq) [balanced] 0.125 M 6.00 x 10 M 0.250 M 0.175 M 0.600 M 2ct Question 6 0/1 pts Calculate the pressure exerted by 5.12 grams of chlorine gas in a 850 mL sealed flask at 27.0°C....
Question 19 2 pts Which of the following is an example of crowd-out associated with the Medicare Program? Some low-income single parents with young children might purchase private health insurance in the absence of the Metlitaan: Pr raliï. Some elderly and disabled people might go without insurance in the absence of the Medicare Program Individuals who sign up for Medicare tend to be more unhealthy on average. O None of the above
Question 3 1 pts Calculate the mass of 23.5 cm3 of aluminum if the density is 2.70 g/ml
D Question 19 3 pts Which one of the following additions will react with 25.0 mL of 0.30 M NHto form a buffer? O 30.0 mL of 0.20 M Naci O 37.5 mL of 0.20 M HCI 30.0 mL of 0.20 M HCI 0 40.0 mL of 0.20 M NaCl
Question 1 (Review): Make the following conversions (4 pts). A. Grams of oxygen in 0.158 mol dinitrogen tetroxide (1 pt) B. TOTAL ions in 32.7 g of Copper (I) carbonate (1 pt) C. Grams of nickel (II) nitrate in a 0.0233 M solution with a volume of 55.0 mL (1 pt) D. Atoms of gold in a gold nanoparticle (density of gold = 19.3 g/cm3 , volume of a gold nanoparticle, 33.5 nm3 ) (1 pt) Question 2 (Review): Balance...
The following Table 1 gives the density of water at different temperatures. Use this information to complete the data and calculations in Table 2 and calibrate the true volume of a 10 mL pipet. Please include units and round off to the correct significant figures/decimal places at each step. 1. Table 1 Density Density Temp. "C Temp. C g/mL g/mL 0.99780 22 18 0.99865 0.99757 0.99844 23 19 0.99733 0.99823 24 20 0.99708 21 0.99802 25 Table 2 Trial 3...
Question 17 A solution is prepared by dissolving 45 g sodium carbonate, Na2CO3, in enough water to make 200 mL of solution. If the density of the solution is 1.1094 g/mL, what is the % mass of the solution? Question 18 Calculate the molarity of a 4.628 m solution of Sr(NO3)2 in H2O. The density of this solution is 1 g/mL Include units. Question 19 What is the molarity of a sodium chloride solution prepared by diluting 2.1 mL of...