I need help with these questions in chemistry lab1) Assume an air bubble had been in the buret tip when you took your first reading and it was replaced by NaOH during the course of the titration. Would your experimental value for the concentration of NaOH be too high, too low, or unchanged as compared to the true value? Explain 2) Assume the buret had been wet with water because it was not adequately rinsed with base. Would your experimental value for concentration of NaOH be too high, too low, or unchanged as compared to the true value? Explain3) Using your calculated concentration of NaOH from lab how many grams of KHP would you need to start with in order to have an end point at 35.00 mL?4) If 0.839 g of KHP were titrated, and 34.58 mL NaOH solution were necessary to reach the equivalence point, what is the concentration of the NaOH solution? (Make sure to report the correct number of significant figures).*** Make sure it's not plagiarized

1. A hydrogen atom in a certain excited state has its electron in a 5f subshell. The electron drops down to the 3d subshell, releasing a photon in the process.a) For each of these subshells, give the n and l quantum numbers, and give the range of possible ml quantum numbers.b)How many radial nodes and how many angular nodes does each of the orbitals in part (a) have?c)Determine the wavelength of light that would be emitted by this process.d) The hydrogen atom now has a single electron in the 3d subshell. Calculate the energy (in kJ/mol) required to ionize this (excited state) hydrogen atom. This is the energy required to remove the electron completely from the atom.2. The photoelectric binding energy of cesium is 183.7 kJ/mol. Light having a wavelength of 2.4 ×10–7m falls upon a cesium surface in an evacuated tube. Calculate the minimum deBroglie wavelength of the emitted photoelectrons3. For each of the following orbitals, provide a sketch of the orbital in the Cartesian x,y z coordinate system that clearly shows the shape and orientation of the orbital. Determine the number of angular nodes and the number of radial nodes in the orbital, and describe where any angular nodes are located. (For instance, the 2px orbital has an angular node in the yz plane)a) 1sb) 3pxc) 3dx2y2d) 3dxz4. Write electron configurations and count the number of unpaired electrons in:O, Si, Ni, I, Ir, Bi, Gd

Chapter3:Show all work1. How many moles are in 3.01x1023 atoms of Rb?2. How many atoms are in 54.0 g of Al?3. Determine the mass (g) of 0.120 mol of C6H12O6.4. Determine the percent of C in Na2C2O4.5. Determine the empirical formula for a compound composed of 34.6 % C, 3.9 % H, and 61.5 % O.6. A compound composed of 41.39% C, 3.47% H, and 55.14% O. The molar mass of the compound is 116.07 g/mol. What is the molecular formula of the compound?7. Given the balanced equation: 2Al + 3H2SO4 --> Al2(SO4)3 + 3H2How many grams of H2 are formed from 0.234 g of H2SO4?8. Given the following balanced equation: 2KBr + Cl2 --> 2KCl + Br2When 0.855 g of Cl2 and 3.205 g of KBr react,a. Determine the limiting reactant.b. How many grams of Br2 are formed?c. How many grams of the excess reactant are needed for the reaction?d. How many grams of the excess reactant will remain at the end of the reaction?e. If 1.67 g of Br2 are made in the reaction, what is the percent yield of Br2?-------------------------------------------------------------------------------------------------------------------Chapter 4: 1. Calculate the molarity of a solution prepared by dissolving 1.37 g of Co(NO3)2 to make 24.9 mL of solution. 2. Assign oxidation numbers to all atoms in the following: a. HNO3 b. Cr2O72-3. Given Ag + PtCl2 --> AgCl + Pta. What is reduced?b. What is oxidized?c. What is the reducing agent?d. What is the oxidizing agent?4. How many grams of MgBr2 are required to prepare a 250. mL solution with a concentration of 2.16 M?5. 2Na3PO4 + 3Pb(NO3)2 --> 6NaNO3 + Pb3(PO4)2What volume (mL) of a 0.100 M Na3PO4 is required to react with 150.0 mL of a 0.250 M Pb(NO3)2 solution?6. Given BaCl2(aq) + Na2SO4(aq) -->a. Write the molecular equation.b. Write the total ionic equation.c. Write the net-ionic equation.d. Identify the spectator ion(s).