When iron rusts, solid iron reacts with gaseous oxygen to form solid iron(III)oxide. Write a balanced chemical equation for this reaction . Solution: If the question says solid, we need to write (s) next to the compound, liquid means (l), gaseous means (g) and aqueous means (aq). Solid iron is Fe(s). Gaseous oxygen is O2(g)….
Regents Chemistry Practice Problems : PERIODIC TABLE AND TRENDS Topics include: Groups and periods, allotropes, periodic table trends for ionization energy, atomic radius and electronegativity. REGENTS CHEMISTRY COURSE August 2024 1. 2. 3. June 2024 4. 5. January 2024 6. 7. 8. August 2023 9. REGENTS CHEMISTRY COURSE and other topics practice.Regents Chemistry Review with…
How To Determine If The Molecule Is Chiral? A chiral molecule is a molecule whose mirror image is non-superimposable. An example that is usually given in textbooks is that of our hands. Our hands are mirror images of one another. Yet, if you try to superimpose them on top of one another, it will be…
Regents Chemistry Practice Problems : NUCLEAR CHEMISTRY Topics include: Table O, Table N, types of radioactive decay, balancing nuclear reactions, fusion and fission, half live calculations. REGENTS CHEMISTRY COURSE August 2024 1. 2. 3. June 2024 4. 5. 6. January 2024 7. 8. 9. REGENTS CHEMISTRY COURSE and other topics practice.Regents Chemistry Review with Transformation…
Newman projection is a short hand way to represent a molecule looking straight down a bond connecting two carbons. Let’s take a look at a molecule below. In the picture below, imagine looking standing to the left and looking at the first carbon. You will see group A on top, group B to the left…
Regents Chemistry Practice Problems : GASES Topics include: Gas laws, kinetic molecular theory REGENTS CHEMISTRY COURSE June 2024 1. 2. August 2024 3. 4. 5. 6. January 2024 8. 9. REGENTS CHEMISTRY COURSE and other topics practice.Regents Chemistry Review with Transformation Tutoring
Determine the number of moles of hydrogen in 0.0885 mol C4H10 Solution: There are 10 atoms of hydrogen in every molecule of C4H10. Therefore, 1 mol of C4H10 will have 10 moles of hydrogen. 0.0885 mol C4H10 * (10 moles of hydrogen/ 1 mol of C4H10) = 0.885 moles of hydrogen LINKS General Chemistry CourseOnline…
A sugar crystal contains approximately 1.8*1017 sucrose (C12H22O11) molecules. What is its mass in milligrams? Solution: To go from molecules to milligrams, we will first need to convert molecules to moles using Avogadro’s number, then convert moles to grams using Molar Mass of the molecule(C12H22O11) and finally convert grams to milligrams (1g=1000mg). LINKS General Chemistry…
Calculate the mass (in g) of 2.8*1022 H2O molecules Solution: To go from molecules to grams, we will first need to convert molecules to moles using Avogadros number and then convert moles to grams using Molar Mass of the molecule. LINKS General Chemistry Review Transformation Tutoring
Let’s do some R/S configuration practice and check solutions.1. Assign R/S configuration to each chirality center in the following molecules: 2. Draw the line bond structures of the following molecules:a. (S)-3-ethyl-2-methyloctaneb. (3R,5S,6R)-5-ethyl-3,6-dimethylnonanec. (4R,5S)-4,5-diethyloctaned. (3S,6S)-6-isopropyl-3-methyldecane CHALLENGE PROBLEM3. Assign R/S configuration to each chirality center in the following molecule called brucine: LINKS Organic Chemistry Course Online Organic…