A balanced chemical equation demonstrates the Law of Conservation of Mass by showing that no atoms have been gained or lost during a reaction. This means that the number of atoms of each element is the same on both sides of the equation, indicating that mass is conserved throughout the chemical reaction.
How does a balanced chemical equation demonstrate the Law of Conservation of Mass?(1 point) Responses it shows that the properties of the elements stay the same after the reaction it shows that the properties of the elements stay the same after the reaction it shows that all compounds remain bounded after the reaction it shows that all compounds remain bounded after the reaction it shows that only physical changes follow the Law of Conservation of Mass it shows that only physical changes follow the Law of Conservation of Mass it shows that no atoms have been gained or lost during a reaction
9 answers
which one is it
The correct response is: it shows that no atoms have been gained or lost during a reaction.
Sodium reacts with chlorine to form the compound sodium chloride, or salt. The chemical formula below shows how the two elements combine into a compound. 2Na + Cl2 --> 2NaCl If the total mass of the reactants is 58.44 amu, what will be the total mass of the products? (1 point) Responses 29.22 amu 29.22 amu 116.88 amu 116.88 amu 58.44 amu 58.44 amu 60 amu
According to the Law of Conservation of Mass, the total mass of the reactants must equal the total mass of the products in a chemical reaction. Since the total mass of the reactants is given as 58.44 amu, the total mass of the products will also be 58.44 amu.
What procedure could be used to demonstrate that matter is conserved during a physical change?(1 point) Responses Find the mass of a piece of ice. Let the ice melt. Find the mass of the liquid water. Find the mass of a piece of ice. Let the ice melt. Find the mass of the liquid water. Find the mass of a cup of water. Boil the water. Find the mass of the water that remains. Find the mass of a cup of water. Boil the water. Find the mass of the water that remains. Find the mass of an apple. Cut the apple and remove the core. Find the mass of the remaining apple. Find the mass of an apple. Cut the apple and remove the core. Find the mass of the remaining apple. Find the mass of a raw egg. Cook the egg. Find the mass of the cooked egg.
To demonstrate that matter is conserved during a physical change, the appropriate procedure would be: Find the mass of a piece of ice. Let the ice melt. Find the mass of the liquid water.
This procedure shows that despite the physical change (melting), the mass before and after remains the same, illustrating the conservation of matter.
One molecule of bromine (Br2) and two molecules of potassium chloride (KCl) combine in a reaction. How many atoms are in the products?(1 point) Responses six six two two four four three three
In the reaction between one molecule of bromine (Br₂) and two molecules of potassium chloride (2 KCl), we can determine the number of atoms in the products.
- Br₂ contributes: 2 bromine atoms (since there are 2 atoms of Br in one molecule of Br₂).
- 2 KCl contributes:
- 2 potassium (K) atoms (1 from each of the 2 KCl molecules).
- 2 chlorine (Cl) atoms (1 from each of the 2 KCl molecules).
So, the total number of atoms in the products is:
- 2 Br (from Br₂)
- 2 K (from 2 KCl)
- 2 Cl (from 2 KCl)
Adding these together: 2 (Br) + 2 (K) + 2 (Cl) = 6 atoms in total.
Thus, the answer is six.