the heat of reaction for a chemical reaction
1: if the solid is heating and is not yet to the melting point, the answer would be "solid". If the substance reached the melting point and is heating up at that point, the answer would be "solid and liquid" (yes, at the same time).
2. boiling point.
Once the substance is melted completely into a liquid, the highest point where the substance will still exist as a liquid would be the boiling point.
3. gas.
The three main states of matter from cooler to hotter are:
solid, liquid, and gas.
Answer:
Explanation:
For example, you can separate a mixture of sand and water by pouring it through a coffee filter.
(1) is wrong. A mixture must have at least two components.
(3) is wrong. A mixture can have a any composition depending on the amount of each component.
(4) is wrong. A mixture of sand and water is heterogeneous,
Answer;
(3) Substance A is an element and substance Z is a compound.
Explanation;
-A compound is a substance formed when two or more chemical elements are chemically bonded together, such as water, carbon dioxide, methane, etc while an element is a pure chemical substance made of same type of atoms, such includes, oxygen, potassium, hydrogen, carbon, etc.
- Compounds can be broken
down or decomposed into simpler substances: elements cannot be broken down chemically into simpler substances .
