In the chemical expression, 5 C2H4 : There are __________ molecules of Ethene represented which contain a total of _______ atoms of Hydrogen. Please give both answers in number form with a comma between numbers.
To find the number of molecules of Ethene represented in the chemical expression 5 C2H4, we need to understand the notation used. The number "5" in front of C2H4 indicates that there are 5 moles of C2H4.
To convert moles to molecules, we use Avogadro's number, which states that there are 6.022 × 10^23 molecules in one mole of any substance. So, we can use this conversion factor to find the number of molecules.
Let's solve it step-by-step:
Step 1: Calculate the number of moles of C2H4.
Given: 5 moles of C2H4.
Step 2: Convert moles to molecules.
Use Avogadro's number (6.022 × 10^23 molecules per mole) to convert moles to molecules.
Number of molecules = (Number of moles) × (Avogadro's number)
Plugging in the values:
Number of molecules = 5 × 6.022 × 10^23
This will give us the number of molecules of Ethene represented in the chemical expression 5 C2H4.
To find the total number of atoms of Hydrogen, we need to look at the molecular formula C2H4. Each molecule contains 4 atoms of Hydrogen.
Step 3: Calculate the total number of atoms of Hydrogen.
Given: Each molecule of C2H4 contains 4 atoms of Hydrogen.
Multiply the number of molecules obtained in Step 2 by the number of atoms of Hydrogen per molecule.
Total number of atoms of Hydrogen = (Number of molecules) × (Number of atoms of Hydrogen per molecule)
Plugging in the values:
Total number of atoms of Hydrogen = (5 × 6.022 × 10^23) × 4
This will give us the total number of atoms of Hydrogen in the chemical expression 5 C2H4.
Now, performing the calculations:
Number of molecules of Ethene = 5 × 6.022 × 10^23 = 3.011 × 10^24 (in scientific notation) or 30,110,000,000,000,000,000,000 (in standard form)
Total number of atoms of Hydrogen = (5 × 6.022 × 10^23) × 4 = 1.2048 × 10^25 (in scientific notation) or 12,048,000,000,000,000,000,000 (in standard form)
So, the answers in number form, with commas between numbers, are:
Number of molecules of Ethene: 30,110,000,000,000,000,000,000
Total number of atoms of Hydrogen: 12,048,000,000,000,000,000,000