Calculate the following quantities: (b) number of moles of NH 4 Cl in 86.6 g of this substance

Hi everyone Welcome back. So let's get started with this video. So here they want us to calculate the number of moles of ammonium ions And 8.963 g of ammonium sulfate. Okay, so then ammonium sulfite is composed of NH four One plus which is ammonium. And then Sophie is S two so the compound could have a charge of zero. So then and age four, two and so forth. So this is ammonium Sophie. Okay. And then we're also starting off with grams because that is what is given. And then from grams we're going to go to moles and how are we going to go from grams to moles. We're going to use a molar mass of ammonium Sophie And we find it to be 100 32 point 14 Graham's promote Okay, and then for moles we're going to find the most of ammonium ions. So let's go ahead and get started with our Sochi aama tree. So let's start with the grounds given, which is eight point g Mm Ammonium sulfate. So the NH four, two s 04 and then we're going to use the mortar, Mastic little moles Which he said is .14g of ammonium sulfate for one more of ammonium Sophie and then we're going to use moles to find the most of any HR contained. So then one more Good morning. Sophie contains two malls of ammonium ions. So then grams of ammonium sulfate canceled out. Most of ammonium sulfate cancel out. And we get malls of ammonium ions. We do the math and we get zero point 1357 most of ammonium iron. Okay, thank you for watching. I hope this helped. And I'll see you in the next video.

Ch.3 - Chemical Reactions and Reaction Stoichiometry

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Brown 15th Edition

Ch.3 - Chemical Reactions and Reaction Stoichiometry

Problem 36b

Chapter 3, Problem 36b

Calculate the following quantities: (b) number of moles of NH₄Cl in 86.6 g of this substance

Verified step by step guidance

Identify the molar mass of NH_4Cl by adding the atomic masses of nitrogen (N), hydrogen (H), and chlorine (Cl).

Calculate the molar mass: N (14.01 g/mol) + 4 * H (1.01 g/mol) + Cl (35.45 g/mol).

Add these values to find the total molar mass of NH_4Cl.

Use the formula: number of moles = mass (g) / molar mass (g/mol).

Substitute the given mass (86.6 g) and the calculated molar mass into the formula to find the number of moles.

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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 the atoms in a molecule. For ammonium chloride (NH4Cl), the molar mass is approximately 53.49 g/mol, which is essential for converting grams of a substance to moles.

Mole Concept

The mole is a fundamental unit in chemistry that quantifies the amount of substance. One mole contains Avogadro's number of entities (approximately 6.022 x 10^23), allowing chemists to relate mass to the number of particles. Understanding the mole concept is crucial for performing stoichiometric calculations, such as converting grams to moles.

Stoichiometry

Stoichiometry is the area of chemistry that deals with the relationships between the quantities of reactants and products in chemical reactions. It allows for the calculation of moles, mass, and volume in reactions. In this context, stoichiometry is used to determine how many moles of NH4Cl are present in a given mass, facilitating the understanding of chemical quantities.