West Los Angeles College » Chemistry » Chem 051 - Fundamentals of Chemistry » Winter 2021

When the equation Si(s) + HF(aq) → SiF4(g) + H2(g) is balanced, what is the coefficient for HF?

Classify the following reaction: 2Mg(s) + O2(g) → 2MgO(s)

The name for SrCl2 is

When the following equations are balanced using the smallest possible integers, what is the number in front of the underlined substance in each case? Reference: Ref 6-2 C2H6(g) + O2(g) → CO2(g) + H2O(g)

The formula for calcium hydrogen sulfate is

Sodium chlorite has the formula

True or false? Oxidation and reduction must occur simultaneously.

How many molecules of O2 are there in 7.9 mol of O2?

The molar mass of blood sugar, C6H12O6, also known as glucose and dextrose, is

The correct formula for lead(II) sulfite is

The correct formula for iron(III) phosphide is

The correct name for P2O5 is

The equation 2Ag2O(s) → 4Ag(s) + O2(g) is a(n) ______________ reaction.

Which of the following formulas is incorrect?

When the following equations are balanced using the smallest possible integers, what is the number in front of the underlined substance in each case? Reference: Ref 6-2 Pb(s) + AgNO3(aq) → Pb(NO3)2 + Ag(s)

The correct name for LiCl is

What is the formula for cobalt(II) chloride?

The correct name for the Al3+ species is

Which represents the greatest number of atoms?

Which of the following represents the hypochlorite ion?

The substance ClO3- is best described as

The carbonate ion has the formula CO32-. What is the correct formula for sodium carbonate?

The name for NH4Br is

When the following equations are balanced using the smallest possible integers, what is the number in front of the underlined substance in each case? Reference: Ref 6-2 N2(g) + O2(g) → N2O3

True or false? The equation N2(g) + 3H2(g) → 2NH3(g) can be interpreted by saying that 1 mol of N2 reacts with 3 mol of H2 to form 2 mol of NH3.

True or false? A balanced chemical equation is one that has the same number of moles of molecules on each side of the equation.

The formula for the compound formed from ammonium and sulfate ions is

The name of the compound NH4ClO4 is

True or false? A sample of an element with a mass equal to that element's average atomic mass expressed in grams contains one mole of atoms.

The correct formula for lead(IV) nitrate is

One mole of something consists of ____________ units of that substance.

The name for Al(OH)3 is

Which represents the greatest mass?

The correct formula for the carbonate ion is

Titanium(IV) oxide has the formula

The binary compound PCl3 is called

True or false? A mole ratio is used to convert the moles of a starting substance to the moles of a desired substance.

The equation 2Al(s) + 2Br2(l) → 2AlBr3(s) is a(n) ______________ reaction.

The name for NaHCO3 is

The correct name for FeO is

The correct formula for ammonium sulfate is

The charge on a barium ion in its ionic compound is

A reaction that involves a transfer of electrons is called a(n) ______________ reaction.

Potassium chlorate has the formula

True or false? In naming ionic compounds, the cation is always named first and the anion second.

True or false? One atomic mass unit (amu) is the mass (in grams) of one mole of the substance.

The name for Sn2+ is

Chem 051 - Fundamentals of Chemistry » Winter 2021 » Midterm Exam II

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