객관식
Which of the following is the correct chemical symbol for phosphorus?
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2. Atoms & Elements
Periodic Table: Element Symbols
객관식
Which element has a molar mass of 30.974 g/mol?
A
Silicon (Si)
B
Chlorine (Cl)
C
Phosphorus (P)
D
Sulfur (S)
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검증된 단계별 안내1
Understand that the molar mass of an element corresponds to the atomic mass of that element expressed in grams per mole (g/mol). This value is typically found on the periodic table.
Look up the atomic masses of the given elements on the periodic table: Silicon (Si), Chlorine (Cl), Phosphorus (P), and Sulfur (S).
Compare each element's atomic mass to the given molar mass of 30.974 g/mol.
Identify which element's atomic mass matches 30.974 g/mol. This element will be the one with the molar mass of 30.974 g/mol.
Confirm that the element with atomic mass closest to 30.974 g/mol is Phosphorus (P), as its atomic mass is approximately 30.974 g/mol.
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