Q2 QSE Review

A student attempt to write the formula for Iron II nitrate (see image). The student did several things incorrectly, but got some things right. What were they? (Select all that apply)

• The chemical symbol for the anion

• The chemical symbol for the cation

• The subscript on the cation

• The subscript on the anion

How many double bonds exist within a molecule of acetylene (C₂H₂)?

• 1

• 2

• 0

• 3

The International Union of Pure and Applied Chemistry (IUPAC) created a worldwide system of chemical nomenclature to help scientists around the world communicate. Which of the following are rules of this system? (Select all that apply)

• When naming acids, the name is based upon whether or not the acid is binary or polyatomic.

• When naming binary ionic compounds, the suffix -ide is used on the anion

• When naming polyatomic ionic compounds, the suffix -ous is used on the anion

• When naming binary covalent compounds, prefixes are used to indicate subscripts.

The graphic shows a 20 g sample of calcium carbonate in a crucible, prior to heating. What is the identity of the substance in the bottom of the crucible after the calcium carbonate decomposes by heating? What would the mass of the substance be?

CaCO₃ (s) ---> CaO (s) + CO₂ (g)

• CaO and CO₂, (Greater than 20 g)

• CO_2, (Less than 20 g)

• CaO (less than 20 g)

• CaO and CO₂ (less than 20 g)

Which of the following compounds contains the tin (IV) cation?

What is the name of the compound Mn(NO₂)₃

• Magnesium nitrite

• Manganese (III) nitrite

• Magnesium nitrate

• Manganese (III) nitrate

In an ionic bond, electrons are transferred from __________ to ____________.

• from Metals, to Non-metals

• from Non-metals, to metals

• Less electronegative atoms, to more electronegative atoms

• from more electronegative atoms to less electronegative atoms

A student is trying to balance this chemical equation. How many oxygen atoms should the student note are on the reactant side of this unbalanced chemical equation?

• 6

• 10

• 8

• 3

Magnesium fluoride contains magnesium and fluorine. The magnesium ion has a charge of +2, and the fluorine ion has a charge of -1. What is the formula of magnesium fluoride

The reaction between cobalt (III) chromate and sodium hydroxide occurs as shown below.

_ Co₂(CrO₄)₃ + _ NaOH ---> _ Na₂CrO₄ + _ Co(OH)₃

What should the coefficients be in order to balance this chemical equation?

• 1, 2, 3, 2

• 1, 6, 3, 2

• 2, 3, 6, 4

• 1, 2, 4, 2