Αποτελέσματα Αναζήτησης
Ν2 + 3 Η2 → 2 ΝΗ 3 (3) Η (3) είναι τώρα σωστά γραµµένη χηµική εξίσωση , καθώς έχει γίνει ισοστάθµιση των ατόµων στα δύο µέλη της εξίσωσης.
For example, the -CH 3 group derived from methane (CH 4) results from subtracting one hydrogen atom and is called a methyl group. The alkyl groups we will use most frequently are listed in Table \(\PageIndex{2}\).
CH 3 CH 2 CH 3 Prop ane C 3H 8 4. CH 3 (CH 2 )2 CH 3 But ane C 4H 10 5. CH 3 (CH 2 )3 CH 3 Pent ane C 5H 12 6. CH 3 (CH 2 )4 CH 3 Hex ane C 6H 14 7. CH 3 (CH 2 )5 CH 3 Hept ane C 7H 16 ... CH 2 CH 3 9 8 7 5 4 3 2 1 H 3C CH 2 CH 3 3- ethyl-4,7-dimethylnonane. page 4 of 4 5. Complex Substituents (substituents with branching) a. Named by applying ...
For example, we can represent pentane (CH 3 CH 2 CH 2 CH 2 CH 3) and isopentane [ (CH 3) 2 CHCH 2 CH 3] as follows: Parentheses in condensed structural formulas indicate that the enclosed grouping of atoms is attached to the adjacent carbon atom. Below is an example of a more complicated molecule.
1) Multiply chemical equation (2) by 2: 2SO 3 + 2H 2 O ---> 2H 2 SO 4 ΔH = −226 kJ. 2) Switch the reactants and products in chemical reaction (2). Because of that, the sign of the change in enthalpy becomes positive. Let's number the following chemical equation as (3): (3) 2H 2 SO 4---> 2SO 3 + 2H 2 O ΔH° = 226 kJ. 3) Add chemical ...
Determine the standard enthalpy of formation of Fe 2 O 3 (s) given the thermochemical equations below. Fe (s) + 3 H 2 O (l) → Fe (OH) 3 (s) + 3/2 H 2 (g) Δ rH ° = +160.9 kJ/mol-rxn. H 2 (g) + 1/2 O 2 (g) → H 2 O (l) Δ rH ° = –285.8 kJ/mol-rxn. Fe 2 O 3 (s) + 3 H 2 O (l) → 2 Fe (OH) 3 (s) Δ rH ° = +288.6 kJ/mol-rxn.
We will soon learn how to name branched-chain alkanes. In order to do so, you need to know the names of the common alkyl groups. The names of the straight-chain alkyl groups are derived from the name of the corresponding alkane. Branched alkyl groups that have 4 carbons or less have the names shown below. Ex. nearest the first alkyl substituent.
