Textbook Question
Refer to the nomenclature flowchart (Figure 3.11) to name each compound. c. CoSO4
Ch.3 - Molecules and Compounds
Chapter 3, Problem 72a
Determine the number of moles (of molecules or formula units) in each sample. a. 55.98 g CF2Cl2
Verified step by step guidance1
Step 1: Identify the molar mass of CF2Cl2.
Step 2: Calculate the molar mass by adding the atomic masses of each element in the compound.
Step 3: Use the formula: number of moles = mass of sample (g) / molar mass (g/mol).
Step 4: Substitute the given mass of CF2Cl2 and the calculated molar mass into the formula.
Step 5: Solve the equation to find the number of moles of CF2Cl2 in the sample.
Verified video answer for a similar problem:
This video solution was recommended by our tutors as helpful for the problem above.
Video duration:
1mWas this helpful?
Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Molar Mass
Molar mass is the mass of one mole of a substance, typically expressed in grams per mole (g/mol). It is calculated by summing the atomic masses of all atoms in a molecule. For CF2Cl2, the molar mass can be determined by adding the atomic masses of carbon (C), fluorine (F), and chlorine (Cl) based on their respective quantities in the formula.
Recommended video:
Guided course
02:11
Molar Mass Concept
Avogadro's Number
Avogadro's number, approximately 6.022 x 10^23, is the number of particles (atoms, molecules, or formula units) in one mole of a substance. This constant allows chemists to convert between the number of moles and the number of individual particles, facilitating calculations in stoichiometry and chemical reactions.
Recommended video:
Guided course
01:45Avogadro's Law
Mole Calculation
To determine the number of moles in a sample, the formula used is: moles = mass (g) / molar mass (g/mol). By applying this formula to the given mass of CF2Cl2, one can find the number of moles present in the sample, which is essential for understanding the quantity of molecules involved in chemical reactions.
Recommended video:
Guided course
01:25Mole Concept
Related Practice
Textbook Question
Calculate the formula mass for each compound. c. H2SO4
1
views
Textbook Question
Calculate the formula mass for each compound. a. N2O4
1
views
Textbook Question
Determine the number of moles (of molecules or formula units) in each sample. b. 23.6 kg Fe(NO3)2
1
views
Textbook Question
Determine the number of moles (of molecules or formula units) in each sample. c. 0.1187 g C8H18
Textbook Question
Determine the number of moles (of molecules or formula units) in each sample. d. 195 kg CaO