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What does a chemical formula tell you about a pure substance?
It tells you the elements and the proportions of those elements that are present to make the pure substance.
How many kinds of matter does a pure substance contain?
If it is a pure substance, than only one! Now that pure substance may contain many different elements (as many elements can make up a single pure compound), but a pure substance means only one compound.
What elements can mix with water?
Water is a moderately reactive substance, and can combine with many elements. Notably, sodium explodes in the presence of water.
What best describes the enthalpy of formation of a substance?
The energy change that happens when a substance forms from its elements (APEX)
Are elements considered to be a substance?
Yes, chemical elements are substances.
What does a chemical formula tell you about a pure substance?
It tells you the elements and the proportions of those elements that are present to make the pure substance.
How many elements are in the substance carbon dioxide?
two elements, carbon and oxygen
How can you tell that a substance is a compound by looking at it formula?
the formula tells youwhich elements make up a compound as well as how many atoms of each element are present.
How can you tell a substance is a compound by looking at its' formula?
the formula tells youwhich elements make up a compound as well as how many atoms of each element are present.
What elements are in a substance?
Depends on the substance.
How many kinds of matter does a pure substance contain?
If it is a pure substance, than only one! Now that pure substance may contain many different elements (as many elements can make up a single pure compound), but a pure substance means only one compound.
What kind of substance of water?
Water is considered a pure chemical substance. Its mass and properties are similar to many of the other constituent elements.
What elements can mix with water?
Water is a moderately reactive substance, and can combine with many elements. Notably, sodium explodes in the presence of water.
What best describes the enthalpy of formation of a substance?
The energy change that happens when a substance forms from its elements (APEX)
What are the classifications of pure substance?
the substance is substance
What is the pure substance?
Elements
Are elements considered to be a substance?
Yes, chemical elements are substances.
