Chemistry Chapter: Compound Mass and Molar Concepts

True (A)

Table salt

<p>molecules</p> Signup and view all the answers

<p>HC2H3O2 = Acetic acid CO2 = Dry ice NaCl = Table salt CaO = Quicklime</p> Signup and view all the answers

<p>Avogadro's number (D)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>65.409 g/mol</p> Signup and view all the answers

<p>Mole (D)</p> Signup and view all the answers

<p>True (A)</p> Signup and view all the answers

<p>The sum of the masses of the elements that make up the compound.</p> Signup and view all the answers

<p>g/mol</p> Signup and view all the answers

<p>$6.02 \times 10^{23}$ (B)</p> Signup and view all the answers

<p>True (A)</p> Signup and view all the answers

<p>Mole = The amount of a substance containing the same number of particles as there are atoms in 12 grams of carbon-12 Molar Mass = The mass in grams of one mole of a substance Avogadro's Number = $6.02 \times 10^{23}$, the number of particles in one mole</p> Signup and view all the answers

<p>The atomic masses of the elements in the compound and the number of each atom. (B)</p> Signup and view all the answers

<p>Molar mass of $NH_3$ and Avogadro's number (A)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>80 g/mol</p> Signup and view all the answers

<p>molecules</p> Signup and view all the answers

<p>246 g (B)</p> Signup and view all the answers

<p>True (A)</p> Signup and view all the answers

<p>80 g NH4NO3 / 1 mol NH4NO3</p> Signup and view all the answers

<p>Ammonium nitrate = Main component in explosive mixtures Copper = Absorption of iron and concerned with the formation of hemoglobin. Cinnamyl alcohol = Used in the production of perfumes and deodorants Methane = Major component of gas used for cooking and heating homes</p> Signup and view all the answers

A mole is the amount of substance containing 6.02 × 10²³ particles.

Avogadro's number, 6.02 × 10²³, is the number of particles in one mole.

Molar mass is the mass in grams of one mole of a substance.

1 mole of an element equals its atomic mass in grams.

1 mole of a molecular compound contains 6.02 × 10²³ molecules.

1 mole of ionic compound contains 6.02 × 10²³ cations and anions.

Molar mass is calculated by summing the masses of each element in the compound.

Calculate mass using moles: moles × molar mass = mass.

The mass used for ionic compounds, expressed in amu or u.

The mass used for molecular compounds, expressed in amu or u.

A conversion factor that equals 6.02 × 10²³ atoms or molecules per mole.

A ratio used to convert between different units of measure.

Steps to determine the number of atoms or molecules from mass.

Method to find atoms in a given mass of Zinc using molar mass.

Determining the number of ammonia molecules from a given mass.

The mass of one mole of NH3 is 17 g/mol.

1 mole of NH3 contains 6.02 × 10²³ molecules.

To find moles, divide grams by molar mass: moles = grams/molar mass.

To find molecules, multiply grams by conversion factors for moles then to molecules.

The mass of one mole of NH4NO3 is 80 g/mol.

To find moles of NH4NO3, divide grams by its molar mass: moles = grams/molar mass.

The mass of one mole of copper (Cu) is 63.546 g/mol.

To find mass of Cu, multiply moles by its molar mass: mass = moles × molar mass.