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Chapter 7: Problem 45

Find the molar mass of the following compounds: a. lithium chloride b. copper(I) cyanide c. potassium dichromate d. magnesium nitrate e. tetrasulfur tetranitride

Short Answer

Expert verified
a. Lithium Chloride - 42.39 g/mol, b. Copper(I) Cyanide - 89.56 g/mol, c. Potassium Dichromate - 294.2 g/mol, d. Magnesium Nitrate - 148.31 g/mol, e. Tetrasulfur Tetranitride - 184.3 g/mol

Step by step solution

01

Determine the Molecular Formula

Write down the molecular formula for each compound: a. Lithium Chloride - LiCl, b. Copper(I) Cyanide - CuCN, c. Potassium Dichromate - K2Cr2O7, d. Magnesium Nitrate - Mg(NO3)2, e. Tetrasulfur tetranitride - S4N4.
02

Identify the Atomic Mass of Each Element

Use the periodic table to identify the atomic masses of the individual elements that make up each compound. For instance, lithium (Li) has an atomic mass of 6.94 g/mol, and chlorine (Cl) has an atomic mass of 35.45 g/mol.
03

Calculate the Molar Mass

The molar mass of a compound is obtained by adding up the atomic masses of its constituent elements. For instance, the molar mass of LiCl is 6.94 g/mol (Li) + 35.45 g/mol (Cl) = 42.39 g/mol.
04

Repeat the process for all compounds

Repeat Steps 1-3 for Copper(I) Cyanide, Potassium Dichromate, Magnesium Nitrate and Tetrasulfur Tetranitride.

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