Final answer:
In 1 mole of methane (CH4), there are 4 hydrogen atoms present, thus the correct option is B.
Step-by-step explanation:
In 1 mole of methane (CH4), there are 4 hydrogen atoms present. This can be determined by the molecular formula of methane, which is CH4. The subscript 4 indicates that there are 4 atoms of hydrogen in each molecule of methane. Since 1 mole of any substance contains 6.02 x 10^23 particles, this means that there are 6.02 x 10^23 molecules of methane in 1 mole. Therefore, multiplying the number of molecules (6.02 x 10^23) by the number of hydrogen atoms in each molecule (4) gives us the total number of hydrogen atoms in 1 mole of methane, which is 2.408 x 10^24.
Explanation part: In order to understand the answer to this question, it is important to first understand the concept of moles and Avogadro's number. A mole is a unit of measurement used in chemistry to represent a specific amount of a substance. 1 mole of any substance contains 6.02 x 10^23 particles, which is known as Avogadro's number. This number is based on the atomic mass of carbon-12 and is used to easily convert between the mass of a substance and the number of particles it contains.
Now, let's look at the molecular formula of methane, which is CH4. The subscript 4 indicates that there are 4 atoms of hydrogen in each molecule of methane. This means that for every molecule of methane, there are 4 atoms of hydrogen. Since 1 mole of any substance contains 6.02 x 10^23 particles, this means that there are 6.02 x 10^23 molecules of methane in 1 mole. Therefore, multiplying the number of molecules (6.02 x 10^23) by the number of hydrogen atoms in each molecule (4) gives us the total number of hydrogen atoms in 1 mole of methane, which is 2.408 x 10^24.
To better understand this calculation, let's break it down into steps. First, we have 1 mole of methane, which contains 6.02 x 10^23 molecules of methane. Each molecule of methane contains 4 atoms of hydrogen. Therefore, multiplying 6.02 x 10^23 by 4 gives us the total number of hydrogen atoms in 1 mole of methane, which is 2.408 x 10^24. This can also be written as 2.408 x 10^24 H atoms, where the superscript 24 represents the total number of atoms. Hence, the final answer is 4 hydrogen atoms present in 1 mole of methane.
In conclusion, the correct answer to the question is B) 4. This can be determined by understanding the concept of moles and Avogadro's number, as well as the molecular formula of methane. By following the steps and calculations explained above, we can accurately determine the number of hydrogen atoms present in 1 mole of methane.