객관식
What is the total number of moles of NaCl(s) required to prepare 3.0 liters of a 2.0 M NaCl solution?
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2. Atoms & Elements
Mole Concept
객관식
What is the mole ratio of hydrogen (H) to nitrogen (N) in the ammonia molecule (NH_3)?
A
1:1
B
1:3
C
2:1
D
3:1
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검증된 단계별 안내1
Identify the chemical formula of ammonia, which is NH_3.
Determine the number of atoms of each element in one molecule of ammonia: there is 1 nitrogen (N) atom and 3 hydrogen (H) atoms.
Write the mole ratio of hydrogen to nitrogen by comparing the number of hydrogen atoms to nitrogen atoms in the formula.
Express the ratio as H:N = 3:1, since there are 3 hydrogen atoms for every 1 nitrogen atom.
Confirm that the mole ratio corresponds to the subscripts in the chemical formula, which represent the number of atoms of each element in one molecule.
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