Multiple Choice
Given the reaction: 2Al2O3 → 4Al + 3O2, how many moles of Al would be produced from 20 moles of Al2O3?
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3. Chemical Reactions
Stoichiometry
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Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
In one formula unit of silver sulfide (Ag2S), how many silver atoms are present?
A
2
B
3
C
1
D
4
Verified step by step guidance1
Identify the chemical formula given: Ag2S.
Understand that the subscript number next to an element symbol indicates the number of atoms of that element in one formula unit.
Look at the subscript next to silver (Ag), which is 2 in Ag2S.
This means there are 2 silver atoms in one formula unit of silver sulfide.
Therefore, the number of silver atoms present in one formula unit of Ag2S is 2.
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