1s2 2s2 2p6 3s2 3p6 4s1 c. 1s2 2s2 2p6 3s2 3p6 4s2 d. 1s2 2s2 2p6 3s2 3p6 4s2 3d2 e. 1s2 2s2 2p6 3s2 3p6 4s2 3d10 Page 14 79. What is the electron configuration for an aluminum ion, Al3+? a. 1s2 2s2 2p6 b. 1s2 2s2 2p6 3s2 c. 1s2 2s2 2p6 3p1 d. 1s2 2s2 2p6 3s2 3p1 e. 1s2 2s2 2p6 3s2 3p6 80.
Calculate the volume of 0.250 M H2SO4 that contains 0.250 g H2SO4. 0.250 g H2SO4 x 1 mole x 1 L = 0.0102 L 98.12 g 0.250 mole 5. 1.50 g of NaCl is dissolved in 100.0 mL of water. Calculate the concentration. 6.
1 lone pair, bent C. 2 lone pairs, bent D. 3 lone pairs, bent E. 3 lone pairs, linear 60. The geometry of the SF4 molecule is A. tetrahedral B. trigonal pyramidal. C. trigonal planar. D. square planar. E. distorted tetrahedron (seesaw).
What pieces of laboratory equipment would you use to measure the properties needed to determine the density of a substance? The piece of laboratory equipment needed to find mass is a balance and for volume a graduated cylinder. 3. Using the properties stated in question 1, write the formula for density. D=m/v 4.
(1 point for each molecule) The central atom is C. 2. How many atoms are bonded to the central atom? (1 point for each molecule) There are two atoms bonded to the central atom. 3. How many lone pairs of electrons are on the central atom?
Calculate the mass of the liquid for each trial. (Subtract the mass of the empty graduated cylinder from the mass of the graduated cylinder with liquid.) * Trial 1 35.46-25.3=10.16 * Trial 2 36.01-25.39=10.62 * Trial 3: 36.41-26.03=10.38 2. Calculate the density of the unknown liquid for each trial. (Divide the mass of the liquid calculated above by the volume of the liquid.)
49. What is the magnitude and direction of the electric force on a −1.2 μC charge at a point where the electric field is 2500 N/C and is directed along the +y axis. 55. A total charge of –6.50 µC is uniformly distributed within a sphere that has a radius of 0.150 m. What is the magnitude and direction of the electric field at 0.300 m from the surface of the sphere? 53.
* 3. 3.0 ppm standard: * 3.00 mL of 10.0 ppm phosphate solution was placed in a 25 mL graduated cylinder and diluted to exactly the 10 mL mark with distilled water then poured into a plastic cup labeled 3. Cylinder was rinsed with distilled water. * * 4. Zero standard: 10 mL of distilled water was poured into a plastic cup labeled 0.
Obtain beaker filled with 250 mL of HCl and 5 pennies. 2. Get a pipette and remove 10 mL of that solution (HCl + Zn) and place it in a 100 mL beaker. 3. Add color indicator 4.
Questions: How would you prepare 10 mL of a 0.25M HCl solution if 1M HCl was available? How much 1M HCl is needed? How much distilled water is used? Dilute 2.5ml of 1M solution with 7.5ml of dihydrogen monoxide. From the graph of Molarity vs. Density, created in Data Table 10, what was the relationship between the molarity of the sugar solution and the density of the sugar solution?