객관식
Which of the following is the correct molar mass (in g/mol) of NH4Cl (s), the product formed in the reaction NH3(g) + HCl(g) → NH4Cl(s)?
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2. Atoms & Elements
Calculating Molar Mass
객관식
Which of the following is the correct molar mass (to two decimal places) of silver nitrate, AgNO_3?
A
123.88 g/mol
B
186.88 g/mol
C
107.87 g/mol
D
169.87 g/mol
검증된 단계별 안내1
Identify the atomic masses of each element in silver nitrate (AgNO_3) from the periodic table: silver (Ag), nitrogen (N), and oxygen (O).
Write down the chemical formula of silver nitrate: AgNO_3, which means it contains 1 atom of silver, 1 atom of nitrogen, and 3 atoms of oxygen.
Calculate the total molar mass by summing the atomic masses multiplied by their respective number of atoms: \(\text{Molar mass} = (1 \times M_{Ag}) + (1 \times M_{N}) + (3 \times M_{O})\).
Substitute the atomic masses into the formula and perform the addition to find the molar mass of AgNO_3.
Round the final result to two decimal places to match the required precision.
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