The equation for finding how many moles are in a substance is
moles = mass / relative formula mass,
where mass is measured in g.
The r.f.m. (relative formula mass) is found by adding together all of the atomic masses of the elements in a substance.
e.g. CO2 (carbon dioxide) has 1 atom of carbon and two atoms of oxygen.
The relative atomic mass of carbon is approximately 12.
The relative atomic mass of oxygen is approximately 16.
12 + (2 x 16) = 44
The r.f.m. of carbon dioxide is 44.
You would then divide the mass of the substance (how much there is of it) by its r.f.m. to find the mole number.
I believe the answer is salt. because it is a compound of two distinct elements that can be broken down without changing the properties of substance.
A pure substance is a substance that are made up of only one type of an atom or one type of a molecule. Pure substances may be further broken down into elements and compounds.
Answer: the upper right portion of the periodic table.
Explanation:
gas to liquid
Explanation:
The change of state indicated by this analogy is from gas to liquid.
Cylinder to the left is filled with gases
Cylinder to the right is made up of liquid.
- Gases occupy the volumes of containers they are introduced into.
- They are random and possess a high kinetic energy.
- Liquids have definite volume and flow with one another.
- The gases in A are dispersed and in random motion.
- This phase change is called condensation
learn more:
Phase change brainly.com/question/1875234
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Answer:
Nitrogen fixation is a chemical process by which molecular nitrogen in the air is converted into ammonia or related nitrogenous compounds in soil or aquatic systems. Atmospheric nitrogen is molecular dinitrogen, a relatively nonreactive molecule that is metabolically useless to all but a few microorganisms.
Explanation:
