Multiple Choice
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
Struggling with General Chemistry?
Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
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
Verified step by step guidance1
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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