MP2 Final Flashcardziz 24-25

Front

What is a single replacement (single displacement) reaction?

Back

A chemical reaction where one element replaces another in a compound. Example: Mg(s) + 2HCl(aq) → H2(g) + MgCl2(aq).

Front

How do you calculate percent composition of a compound?

Back

Percent composition = (mass of element in 1 mole of compound / molar mass of compound) × 100%. Example for Cu2S: %Cu = 79.854%, %S = 20.145%.

Front

What characterizes metallic bonds?

Back

Valence electrons are delocalized, forming a 'sea of electrons' that allows metals to conduct electricity and heat.

Front

What is the Lewis Dot Structure for ammonia (NH3)?

Back

The Lewis Dot Structure shows nitrogen (N) in the center with three hydrogen (H) atoms bonded to it, and a lone pair of electrons on nitrogen.

Front

What determines the strength of intermolecular forces in substances?

Back

Intermolecular forces are influenced by factors such as molecular size, polarity, and the presence of hydrogen bonds.

Front

What is the boiling point of a substance indicative of?

Back

The boiling point indicates the strength of intermolecular forces; higher boiling points suggest stronger forces.

Front

What is the universal solvent?

Back

Water is known as the universal solvent because it can dissolve more substances than any other liquid.

Front

What is the significance of the sea of electrons in metallic bonding?

Back

The sea of electrons allows metals to conduct electricity and heat, and gives them malleability and ductility.

Front

What is the formula for calculating molar mass?

Back

Molar mass = sum of the atomic masses of all atoms in a molecule. Example: Cu2S = (2 × Cu) + (1 × S).

Front

What is a covalent bond?

Back

A covalent bond is formed when two atoms share one or more pairs of electrons.