In PCl5, Fe2S3, H3PO4, how many number of
a.)elements
b.)atoms
c.)molecules
are present??
Is it pure?
Is it a compound or a mixture??
How many Adams are present are PCl5
About 3.50
a.) To determine the number of elements in each compound, we need to count the different types of atoms present in each compound.
In PCl5 (phosphorus pentachloride), we have two elements: phosphorus (P) and chlorine (Cl).
In Fe2S3 (iron (III) sulfide), we have two elements: iron (Fe) and sulfur (S).
In H3PO4 (phosphoric acid), we have three elements: hydrogen (H), phosphorus (P), and oxygen (O).
b.) To determine the number of atoms in each compound, we need to count the individual atoms present.
In PCl5, we have:
1 phosphorus atom (P)
5 chlorine atoms (5 Cl)
In Fe2S3, we have:
2 iron atoms (2 Fe)
3 sulfur atoms (3 S)
In H3PO4, we have:
3 hydrogen atoms (3 H)
1 phosphorus atom (P)
4 oxygen atoms (4 O)
c.) To determine the number of molecules in each compound, we need to understand the chemical formula of each compound.
In PCl5, the subscript 5 indicates that we have 5 molecules of PCl5.
In Fe2S3, since there is no subscript after the compound formula, we consider it as one molecule of Fe2S3.
In H3PO4, the subscript 3 indicates that we have 3 molecules of H3PO4.
Is it pure?
Each compound mentioned (PCl5, Fe2S3, and H3PO4) is a pure substance because they consist of a specific combination of elements in a fixed ratio.
Is it a compound or a mixture?
Each compound mentioned (PCl5, Fe2S3, and H3PO4) is a compound because they are chemical combinations of different elements in fixed proportions. A mixture, on the other hand, is a physical combination of two or more substances that can be separated by physical means.