Final Exam Review

The bonds between hydrogen and oxygen in a water molecule are classified as

• Polar Covalent

• Non polar covalent

• Ionic

• Metallic

As a bond between a hydrogen atom and a sulfur atom is formed electrons are

• shared to form an ionic bond

• shared to form a covalent bond

• transferred to form an ionic bond

• transferred to form a covalent bodn

What is the formula for tin (II) flouride

• SnF

• SnF₂

• Sn₂F₂

• Sn₂F

How many molecules are in 4.50 moles of water (H₂O)

• 450

• 2.71 x 10²⁴

• 6.012 x 10²³

• 3.00

Determine the mass of 5.20 moles of C₆H₁₂ (Formula mass = 84.2g/mol)

• 438

• 16.1

• 0.061

• 89.4

Given the Reaction N₂ + 3H₂ -----------> 2NH_{3 .} What is the mole to mole ratio between nitrogen gas and hydrogen gas

• 1:2

• 2:3

• 2:2

• 1:3

Which of the these elements has the least attraction for electrons in a chemical bond

• oxygen

• flourine

• nitrogen

• chlorine

Which statement identifies the element Arsenic

• Arsenic has an atomic number of 33

• Arsenic has a melting point of 84K

• Arsenic has 8 valence electrons

• Arsenic has a radius of 146 pm

Which statement best describes the type of change and the chemical properties of the product and reactants?

• The equation represents a physical change, with the product and reactant having different chemical properties

• The equation represents a physical change, with the product and reactants having identical chemical properties

• The equation represents a chemical change, with the product and the reactants having different chemical properties

• The equation represents a chemical change, with the products and reactants having identical chemical properties

A compound has the empirical formula CH₂O and a gram formula mass of 60 g/mol. What is the molecular formula of this compound

• CH₂O

• C₂H₄O₂

• C₃H₈O

• C₄H₈O₄