1 molecule bromine and two molecules of potassium chloride combine in a reaction. How many atoms are in the products?
A.3
B.4
C.2
D.6
whats your answer and why
The correct answer is D. 6.
In the reaction, one molecule of bromine (Br2) combines with two molecules of potassium chloride (2KCl) to form two molecules of potassium bromide (2KBr) and two molecules of chlorine gas (Cl2).
Breaking down each molecule, we can count the number of atoms:
- Br2: 2 atoms of bromine (2 x 1 = 2 atoms)
- 2KCl: 2 atoms of potassium (2 x 1 = 2 atoms) and 2 atoms of chlorine (2 x 1 = 2 atoms)
- 2KBr: 2 atoms of potassium (2 x 1 = 2 atoms) and 2 atoms of bromine (2 x 1 = 2 atoms)
- Cl2: 2 atoms of chlorine (2 x 1 = 2 atoms)
Total atoms in the products = 2 + 2 + 2 + 2 = 8
Since there are 8 atoms in the products, the answer is not listed among the options provided.
To determine the number of atoms in the products, we first need to find the number of atoms in one molecule of bromine and one molecule of potassium chloride.
1 molecule of bromine (Br) contains 2 atoms of bromine (Br).
1 molecule of potassium chloride (KCl) contains 1 atom of potassium (K) and 1 atom of chlorine (Cl).
Now, let's calculate the total number of atoms in the products.
Given:
- 1 molecule of bromine (Br)
- 2 molecules of potassium chloride (KCl)
The total number of atoms in the products can be calculated as follows:
Number of atoms in bromine (Br) = Number of molecules of bromine (Br) x Number of atoms in one molecule of bromine (Br)
= 1 x 2
= 2 atoms
Number of atoms in potassium chloride (KCl) = Number of molecules of potassium chloride (KCl) x Number of atoms in one molecule of potassium chloride (KCl)
= 2 x (1 + 1)
= 4 atoms
Hence, the total number of atoms in the products is 2 + 4 = 6 atoms.
So, the correct answer is option D. 6.
To determine the number of atoms in the products, we need to calculate the total number of atoms in each compound and then add them together.
Starting with bromine, the chemical formula for bromine is Br₂, indicating that each bromine molecule contains 2 atoms of bromine.
Next, for potassium chloride, the chemical formula is KCl. This means that each potassium chloride molecule contains 1 atom of potassium (K) and 1 atom of chlorine (Cl).
Given that we have 1 molecule of bromine and 2 molecules of potassium chloride in the reaction, the total number of atoms can be calculated as follows:
Number of atoms in bromine = 1 molecule × 2 atoms/molecule = 2 atoms
Number of atoms in potassium chloride = 2 molecules × (1 atom of potassium + 1 atom of chlorine) = 2 molecules × 2 atoms/molecule = 4 atoms
Adding the number of atoms in both compounds together:
Total number of atoms = Number of atoms in bromine + Number of atoms in potassium chloride = 2 atoms + 4 atoms = 6 atoms
Therefore, the correct answer is D. 6 atoms.