CH7 Section Review Questions
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
