Question
One molecule of bromine and two molecule of potassium chloride combine in a reaction. How many atoms are in the products?
1. two
2. six
3. four
4. Three
1. two
2. six
3. four
4. Three
Answers
GPT 3.5
The balanced chemical equation for the reaction of one molecule of bromine (Br₂) and two molecules of potassium chloride (2KCl) is:
Br₂ + 2KCl → 2KBr + Cl₂
In the products, we have 2 moles of potassium bromide (2 KBr) and 1 mole of chlorine gas (Cl₂).
To find the number of atoms in the products, we need to multiply the number of moles by Avogadro's number, which is approximately 6.022 × 10²³.
For 2 moles of potassium bromide, we have:
2 moles KBr × 6.022 × 10²³ atoms/mole = 12.044 × 10²³ atoms
For 1 mole of chlorine gas, we have:
1 mole Cl₂ × 6.022 × 10²³ atoms/mole = 6.022 × 10²³ atoms
Adding these two quantities together:
12.044 × 10²³ + 6.022 × 10²³ = 18.066 × 10²³
Therefore, there are approximately 18.066 × 10²³ atoms in the products.
So the correct answer is 18.066 × 10²³ atoms, which is closest to option 4. Three.
Br₂ + 2KCl → 2KBr + Cl₂
In the products, we have 2 moles of potassium bromide (2 KBr) and 1 mole of chlorine gas (Cl₂).
To find the number of atoms in the products, we need to multiply the number of moles by Avogadro's number, which is approximately 6.022 × 10²³.
For 2 moles of potassium bromide, we have:
2 moles KBr × 6.022 × 10²³ atoms/mole = 12.044 × 10²³ atoms
For 1 mole of chlorine gas, we have:
1 mole Cl₂ × 6.022 × 10²³ atoms/mole = 6.022 × 10²³ atoms
Adding these two quantities together:
12.044 × 10²³ + 6.022 × 10²³ = 18.066 × 10²³
Therefore, there are approximately 18.066 × 10²³ atoms in the products.
So the correct answer is 18.066 × 10²³ atoms, which is closest to option 4. Three.