an unknown sample did not decompose either by physical or chemical means this unknown sample is most likely to be
a) a compound
b) an element
c) a heterogeneous mixture
d) a homogenous mixture
Answers
An unknown sample did not decompose either by physical or chemical means this unknown sample is most likely to be
b) an element
1. Decomposition reaction is "a type of chemical reaction in which a single compound breaks down into two or more elements or new compounds."
2. Occurrence of these reactions is characterized by liberation of heat or light.
3. Heat of light provides energy to breakdown the compound.
4. A chemical element is "a species of atom having the same number of protons in their atomic nuclei".
5. Compound is formed by combination of two or more elements.
6. Example - carbon di oxide, water
7. Heterogeneous mixture is a mixture of compounds in their dissimilar form of state.
8. Example - sand and water.
9. Homogeneous mixture is a mixture of all compounds in same state.
10. Example - saline solution, air.
Answer:
An unknown sample did not decompose either by physical or chemical means this unknown sample is most likely to be
b) an element
1. Decomposition reaction is "a type of chemical reaction in which a single compound breaks down into two or more elements or new compounds."
2. Occurrence of these reactions is characterized by liberation of heat or light.
3. Heat of light provides energy to breakdown the compound.
4. A chemical element is "a species of atom having the same number of protons in their atomic nuclei".
5. Compound is formed by combination of two or more elements.
6. Example - carbon di oxide, water
7. Heterogeneous mixture is a mixture of compounds in their dissimilar form of state.
8. Example - sand and water.
9. Homogeneous mixture is a mixture of all compounds in same state.
10. Example - saline solution, air.
Explanation: