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2. Atoms & Elements

Calculating Molar Mass

2. Atoms & Elements

Calculating Molar Mass

Multiple Choice
Calculate the molecular weight of C₃H₅N₃O₃.
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Multiple Choice
The reaction between nickel metal and hydrochloric acid is not a simple dissolution. The product formed is NiCl₂ • 6 H₂O (s), nickel (II) chloride hexahydrate, which has exactly 6 waters of hydration in the crystal lattice for every nickel ion. What is the molar mass of nickel (II) chloride hexahydrate, NiCl₂ • 6 H₂O (s)?
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Multiple Choice
What is the molar mass of diazepam also known as Valium if 0.05570 mol weighs 15.86 g?
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Multiple Choice
Use the data in the table to calculate the atomic mass of silicon.
Exact Mass and Abundance of 3 Isotopes of Silicon
Isotope Isotopic Mass Abundance
²⁸Si 27.97693 amu 92.23%
²⁹Si 28.97649 amu 4.67%
³⁰Si 29.97376 amu 3.10%
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Multiple Choice
The atomic mass of argon is 39.948 amu. Without any mathematical computations, which of the following isotopes has the largest natural abundance?

Exact Mass 3 Isotopes of Argon
Isotope Isotopic Mass
³⁶Ar 35.96755 amu
³⁸Ar 37.96272 amu
⁴⁰Ar 39.96238 amu
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Multiple Choice
Which of the following represents the largest amount of Ag?
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