CH7 Section Review Questions

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Write a formula for the compound formed between the following: magnesium and iodine

MgI2

A compound contains 36.48% Na, 25.41% S, and 30.11% O. Find its empirical formula.

Na2SO3

Write a formula for the following compound: lead(II) nitrate

Pb(NO3)2

Name the following compound by using the stock system: CaO

calcium(II) oxide

Name the following binary molecular compound according to the stock system: CI4

carbon(IV) iodide

Write a formula for the compound formed between the following: NH4^+ and SO4^2-

(NH4)2SO4

Assign oxidation numbers to each atom in the following: H2CO3

+1, +4, -2

Assign oxidation numbers to each atom in the following: Na2O2

+1, -1

Assign oxidation numbers to each atom in the following: H2O

+1, -2

Assign oxidation numbers to each atom in the following: PI3

+3, -1

Assign oxidation numbers to each atom in the following: NO2^-

+3, -2

Assign oxidation numbers to each atom in the following: CS2

+4, -2

Assign oxidation numbers to each atom in the following: SO4^2-

+6, -2

What is the mass in grams of 3.25 mol Fe2(SO4)3?

1.30 x 10^3 g

Determine the molar mass of ammonium carbonate, (NH4)2CO3.

96.11 g/mol

Find the empirical formula of a compound that contains 53.70% iron and 46.30% sulfur.

Fe2S3

Write a formula for the compound formed between the following: Fe^3+ and S^2-

Fe2S3

Write a formula for the following compound: iron(II) sulfate

FeSO4

What is the significance of a chemical formula?

It indicates the types and numbers of atoms or ions present in a formula unit or molecule of a compound.

Analysis of a compound indicates that it contains 1.04 g K, 0.70 g Cr, and 0.86 g O. Find its empirical formula.

K2CrO4

If 4.04 g of N combine with 11.46 g O to produce a compound with a formula mass of 108.0 amu, what is the molecular formula of this compound?

N2O5

Write a formula for the compound formed between the following: sodium and oxygen

Na2O

Write a formula for the following compound: sodium hydroxide

NaOH

Write a formula for the following compound: diphosphorus trioxide

P2O3

Write a formula for the compound formed between the following: Pb^2+ and O^2-

PbO

Write a formula for the compound formed between the following: Sn^2+ and I^-

SnI2

Name the following binary molecular compound according to the stock system: As2S3

arsenic(III) sulfide

Name the following compound by using the stock system: MgS

magnesium(II) sulfide

Name the following binary molecular compound according to the stock system: NCl3

nitrogen(III) chloride

Name the following compound by using the stock system: K2S

potassium(I) sulfide

Draw the Lewis structure, give the name, and predict the VSEPR geometry of: SCl2

sulfur dichloride, bent or angular, and see teacher manual for lewis structure

Name the following binary molecular compound according to the stock system: SO3

sulfur(VI) iodide

Assign oxidation numbers to each atom in the following: HF

+1, -1

Assign oxidation numbers to each atom in the following: CI4

+4, -1

How many moles of atoms of each element are there in one mole of (NH4)2CO3?

2 mol N, 8 mol H, 1 mol C, 3 mol O

Calculate the percentage composition of (NH4)2CO3.

29.15% N, 8.407% H, 12.50% C, 49.94% O

How many molecule of aspirin, C9H8O4, are there in a 100.0 mg tablet of aspirin?

3.342 x 10^20 molecules

Determine the formula mass of ammonium carbonate, (NH4)2CO3.

96.11 amu

Write a formula for the compound formed between the following: aluminum and bromine

AlBr3

Write a formula for the following compound: carbon diselenide

CSe2

Write a formula for the compound formed between the following: Cu^2+ and NO3^-

Cu(NO3)2

Name the following compound by using the stock system: CuBr

copper(I) bromide

Determine the oxidation numbers for iron oxide, Fe3O4 (Recall that oxidation numbers are integers).

each oxygen is -2, one of the iron atoms is +2, and two of the iron atoms are +3

Name the following compound by using the stock system: FeCl2

iron(II) chloride

Name the following compound by using the stock system: NaI

sodium(I) iodide


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