Lewis Dot structure is a representation of how electrons are arranged in a molecule. To correctly draw lewis dot structures we need to follow the following six steps. 1. Calculate the total number of valence electrons 2. Connect atoms in a molecule using bonds 3. Subtract electrons used in bonds from the total electrons calculated in part 1 4. Use remaining electrons to make outer atoms happy (octet, 8 electrons) but remember that Hydrogen only wants 2 electrons. 5. If there

SAT Chemistry practice from College Board The hydrogen ion concentration of a solution prepared by diluting 50. mL of 0.10 M HNO3(aq) with water to 500. mL of solution is (A) 0.0010 M (B) 0.0050 M (C) 0.010 M (D) 0.050 M (E) 1.0 M Answer and Explanation: One of the key words in this question is diluting. A solution gets diluted when more water is added and thus the concentration decreases. The formula for dilution is M1V1=M2V2 where M stands for molarity and V stands for volu

For example 20g of NaCl are dissolved in 100ml of water. Thus, HCl is the solute, water is the solvent, and together they make a solution.

Dilution is a common type of problems given to students in the concentration chapter of their chemistry class. To dilute something means to add water to the solution, which will in turn decrease the concentration. The formula for dilution is M1V1= M2V2 where M1= Molarity 1 V1 = Volume 1 M2 = Final Molarity V2= Final Volume Note, that for this formula your volume can be in any units as long as it is consistent on both sides. When do we use this formula and how do we know that

SAT II Chemistry practice question. Topic: Acids and Bases Which of the following is weakly acidic? a. 0.1M HCl b. 0.1M NaCl c. 0.1M HC2H3O2 d. 0.1M CH3OH e. 0.1M KOH Solution: In order for us to answer this question we must know how to identify strong acids and strong bases. We have to memorize strong acids in order to be able to identify them. Strong acids are: HCl - hydrochloric acid, HNO3 - nitric acid, H2SO4 - sulfuric acid , HBr - hydrobromic acid, HI - hydroiodic acid

SAT subject test in Chemistry is administered by College Board. Time: The test is 60 minutes long Number of questions: 85 multiple choice questions Calculator: Not Allowed Periodic table that indicated atomic numbers and masses is provided on the test. Test Dates: Test is offered in August, October, November, December, May, and June. Practice: College board released 2 official tests that can be purchases on its website. To be well prepared for the test, a student has to take

Hydrogen bonding will be exhibited by molecules who have OH, NH, or FH bonds. These forces are especially strong and influence the boiling p

Online chemistry tutoring is easy and convenient for both the student and the tutor. How does it work? Simple! Transformation Tutoring uses Miro whiteboard along with FaceTime videos. A student clicks on the link and gets directed to the platform, where he/she can see the tutor and communicate. The white board capacity allows the tutor to draw and write formulas and molecules as well as upload pictures and graphs. Why is online tutoring convenient for students? 1. You don't h

Since regent is a standardized exam, doing a lot of practice is key to your success. Start by doing an exam in the red regents book and goin