One molecule of bromine (Br) and two molecules of potassium chloride (KCI) combine in a reaction. How many atoms are in the products? (1 point)
a four
b three
c two
d six
The equation for the reaction is:
Br2 + 2KCl -> 2KBr + Cl2
In the products, there are 2 potassium bromide (KBr) molecules, which contain 2 potassium (K) atoms. Additionally, there is 1 molecule of chlorine gas (Cl2), which contains 2 chlorine (Cl) atoms.
Therefore, the total number of atoms in the products is 2 potassium (K) atoms + 2 chlorine (Cl) atoms = 4 atoms.
Answer: a) four
To determine the number of atoms in the products, we need to look at the chemical equation for the reaction:
1 Br2 + 2 KCl → 2 KBr + 1 Cl2
From the equation, we can see that one molecule of bromine (Br2) combines with two molecules of potassium chloride (KCl) to produce two molecules of potassium bromide (KBr) and one molecule of chlorine (Cl2).
To calculate the number of atoms in the products, we count the number of atoms in each molecule:
- For 1 molecule of bromine (Br2), there are 2 bromine atoms (2 Br atoms).
- For 2 molecules of potassium chloride (2 KCl), there are 2 potassium atoms (2 K atoms) and 2 chlorine atoms (2 Cl atoms).
- For 2 molecules of potassium bromide (2 KBr), there are 2 potassium atoms (2 K atoms) and 2 bromine atoms (2 Br atoms).
- For 1 molecule of chlorine (Cl2), there are 2 chlorine atoms (2 Cl atoms).
Adding up the number of atoms in the products, we have:
2 Br atoms + 2 K atoms + 2 Cl atoms + 2 K atoms + 2 Br atoms + 2 Cl atoms = 10 atoms
Therefore, the correct answer is d) six, with a total of 10 atoms in the products.
To determine the total number of atoms in the products of the reaction, we first need to understand the chemical formula of the products.
The reaction between one molecule of bromine (Br2) and two molecules of potassium chloride (KCI) can be represented as:
Br2 + 2KCI -> 2KBr + Cl2
This means that one molecule of bromine reacts with two molecules of potassium chloride to produce two molecules of potassium bromide (KBr) and one molecule of chlorine gas (Cl2).
To find the total number of atoms in the products, we can count the atoms in each molecule.
In the product, 2KBr, there are a total of 4 potassium (K) atoms and 2 bromine (Br) atoms.
In the product, Cl2, there are 2 chlorine (Cl) atoms.
Adding up the atoms from the two products:
4 potassium (K) atoms + 2 bromine (Br) atoms + 2 chlorine (Cl) atoms = 8 atoms
So, the correct answer is (d) six atoms.