WAEC - Chemistry (2023 - No. 10)
Which of the following statements is correct?
Addition reactions occur between alkanes and chlorine.
Butane has a lower boiling point than propane.
Pentane has five isomers.
An alkane with 49 carbon atoms contains 100 hydrogen atoms
Paaiškinimas
The general formula for alkanes is \(C_nH_{2n}+2\). For an alkane with 49 carbon atoms (n = 49), the number of hydrogen atoms can be calculated as follows:
Number of hydrogen atoms (H) = 2n + 2
Number of hydrogen atoms (H) = 2 * 49 + 2
Number of hydrogen atoms (H) = 98 + 2
Number of hydrogen atoms (H) = 100
So, an alkane with 49 carbon atoms contains 100 hydrogen atoms.
Number of hydrogen atoms (H) = 2n + 2
Number of hydrogen atoms (H) = 2 * 49 + 2
Number of hydrogen atoms (H) = 98 + 2
Number of hydrogen atoms (H) = 100
So, an alkane with 49 carbon atoms contains 100 hydrogen atoms.