Molar Mass and Gram Atomic Mass

The atomic mass of an element in u is equal to its molar mass in grams.

To find the molar mass of atoms, we take the atomic mass in u and change the units to grams.

Gram atomic mass is the mass of 1 mole of atoms of an element, where the numerical value remains the same but the units change from u to g.

<p>To calculate the molar mass of a molecule, we keep the numerical value the same as the molecular mass in u, but change the units to grams.</p> Signup and view all the answers

<p>Avogadro's number (6.022 × 10^23) is used to relate the number of atoms or molecules to the mass in grams.</p> Signup and view all the answers

<p>A mole is defined as 6.022 × 10^23 particles (atoms or molecules) of a substance, which is equal to its relative mass in grams.</p> Signup and view all the answers

<p>The Avogadro constant is defined as the number of atoms in exactly 12 g of carbon-12.</p> Signup and view all the answers

<p>Mass of 1 mole of a substance is called its molar mass.</p> Signup and view all the answers

<p>The mole is the amount of substance that contains the same number of particles as there are atoms in exactly 12 g of carbon-12.</p> Signup and view all the answers

<p>The law of definite proportions governs the mass of carbon dioxide formed when carbon is burnt in oxygen.</p> Signup and view all the answers

<p>Polyatomic ions are ions composed of two or more atoms covalently bonded and carrying a net charge.</p> Signup and view all the answers

<p>The molar mass of CaCO3 is approximately 100.09 g/mol.</p> Signup and view all the answers

<p>2 moles</p> Signup and view all the answers

<p>1.8 x 10^24 molecules</p> Signup and view all the answers

<p>32g</p> Signup and view all the answers

<p>34.5g</p> Signup and view all the answers

<p>1.51 x 10^24 atoms</p> Signup and view all the answers

<p>1.2 x 10^23 particles</p> Signup and view all the answers