A molecule in which the central atom forms three single bonds and has one lone pair is said to have a ________ shape. A) bent B) linear C) planar D) pyramidal E) tetrahedral 8. A bond where the electrons are shared equally is called a(an) ________ bond. A) polar covalent B) coordinate covalent C) nonpolar covalent D) ionic E) none of the above 9. In a precipitation reaction the insoluble product can be identified by the symbol ________.
How many multiple bonds (double and/or triple) are there in this molecule? (1 point for each molecule) There are no double or triple bonds on this molecule. CO2 4+2(6)=16 .. .. O = C = O .. .. 1. What is the central atom? (1 point for each molecule) The central atom is C. 2.
Seventy five percent of the table is made up of metals, and a couple of the columns on the right of the table have gases. There are only two elements that are liquids- mercury and bromine. Column 1 contains the alkali metals, which suddenly combust when exposed to air or water. Columns 3-12 are the transition metals, which contain heavier atoms, which are more flexible in how they organize their electrons. Column 17 is made up of the more reactive gases- the halogens.
If 0.100 mol of hydrogen iodide is placed in a 1.0 L container and allowed to reach equilibrium, find the concentrations of all reactants and products at equilibrium. 2 HI (g) === H2 (g) + I2 (g) Ke = 1.84(10-2 [H2]=[I2]= 1.07(10-2 mol/L, [HI]=7.86(10-2 mol/L 6. A 1.00 L reaction vessel initially contains 9.28(10-3 moles of H2S. At equilibrium, the concentration of H2S of 7.06(10-3 mol/L. Calculate the value of Ke for this system.
2.1 Classes of Hydrocarbons: Aliphatic | Aromatic (aka Arenes) | Alkanes, Alkenes, Alkynes | Benzene is an example | Alkanes: All bonds are single bonds Alkenes: Contain at least one C-C double bond Alkynes: Contain at least one C-C triple bond 2.3 Bonding in H2: The Valence Bond Theory Sigma Bond: orbitals overlap along a line connecting the atoms 2.4 Bonding in H2: The Molecular Orbital Model Bonding Orbital and antibonding orbital produced 2.5: Introduction to Alkanes: Methane, Ethane and Propane Alkanes: CnH2n+2 2.6 sp3 Hybridization and Bonding in Methane Sp3 Hybridization 2.7 Bonding in Ethane CH3= Methyl Bonds with sigma bond 2.8 Isomeric Alkanes: The Butanes n-butane: four carbons are joined
b. A compound composed of: 9.93% carbon, 58.6% chlorine, and 31.4% fluorine. c. A compound composed of: .556g carbon and .0933g hydrogen. 3. Write the Molecular Formula for Each of the Following: a.
No details of how the oxides of nitrogen are formed are required, other than the fact that they are formed at high temperatures. Solid particles may contain soot (carbon) and unburnt fuels. b) The combustion of hydrocarbon fuels releases energy. During combustion the carbon and hydrogen in the fuels are oxidised. 18 GCSE Chemistry for teaching from September 2011 onwards (version 1.0) Additional
The one peak at 3.482 ppm indicates the –OCH3 group, because the hydrogen atoms (HA) are adjacent to the highly electronegative oxygen atom. The –CH3 hydrogen atoms observe no splitting because they have no neighboring protons (N=0) therefore it is a singlet. The three peaks at around 0.90 ppm represent the –CH3 group on the opposite end of the molecule, because the three hydrogen atoms (HB) are furthest from the electronegative oxygen atoms and because the protons have two neighboring protons (N=2) indicating a triplet. The three peaks at around 2.40 ppm represent the –CH3 group adjacent to the C=O bond, because the hydrogen atoms (HC) have two neighboring protons (N=2) indicating a triplet and it is next to the electronegative double bond. The NMR spectrum does contain impurities including methanol (4.80 ppm), methyl oleate (5.40 ppm), CHCL3 (7.20 ppm), acetone (2.00 ppm), and water (1.60 ppm).
What element has 11 protons? If an ion had 17 protons and 18 electrons, it would be a negative ion. These are called anions. What element has 17 protons? Atoms and Ions Atoms have no net charge.
In this mixture, there are no enzymes present and therefore no products are formed. The reaction rate was rated 0, just as we anticipated. 2. The 2nd experiment was a mixture of 2 mL H2O2 and 0.1g Manganese dioxide. We can use the same principal we used for the first experiment, Manganese dioxide is not a protein, not an enzyme, it is a catalyst.