Question 1 Which of the following statements is true about the structure of benzene? A. six atomic 2p orbitals interact to form six ni molecular orbitals B. there are three bonding n molecular orbitals and three n antibonding molecular orbitals C. the ground state electronic configuration of benzene has six electrons in threen bonding molecular orbitals D. the carbon-carbon bonds are all the same length E. All of these Question 2 How many among the following heterocyclic compounds is/are aromatic? [Note: Write your response in numerical form. Example: if there are two aromatic compounds in the list your response should be 2 and not two.]

A bucket of water has a volume of 0.473 kL . How many dL is this? STARTING AMOUNT ADD FACTOR ANSWER RESET *( ) 47300 1000 0.001 0.01 10 4730 0.0000473 100 0.473 0.1 1 0.00473 473 0.000473 kL dL +

50 Percentage Red No. 40 Soln 100% 80% 60% 40% Table 4.1: Dilutions of Red No. 40 & Absorbance Volume of Red No. 40 Soln (mL) 10me 8mL опи 4mL Percentage Red No. 40 Soln 100% 80% 60% 40% 20% Volume of DI Water (mL) OML 2mL LIML M UML 8ML Table 4.2: Dilutions of Red No. 40 & Absorbance Concentration Red No. 40 2. Report the wavelength with the maximum absorbance of Red No. 40 dye. Absorbance 20% 2ML Part A: Making a Calibration Curve for Beer's Law 1. Calculate the concentrations of each of your diluted Red No. 40 solutions and add these to Table 4.2. Show at least one sample calculation in the space below. 0.251 0.192 Total Volume 0.181 0·119 0.060 (mL) 10 mL 10 mL 10 mL 10 mL 10 mL

Complete each row of the table below by filling in the missing prefix. 1 | Hz 3 10 Hz %3D 1 Hz 10 Hz -6 1 Hz 10 Hz %3D -1 1 Hz 10 Hz

A standard reference material is certified to contain 94.6 ppm of an organic contaminant. Your analysis gives you the follow values, 98.6, 98.4, 95.1 and 97.2 ppm. Can you say with 95% confidence that your values differ from the certified value. Please show work

Need help on all of them. It is mu first time taking chemistry so I am stuck on what to do. Thank you

6-9 and 11-17

p =0.007y^(2)-0.02y+118 if a persons systolic pressure is 130.67 mm hg, what is their age?

Can you show how to out this calculation in the calculator? Everytime I do it, I get a different answer.

pls help fill in the missing parts