Homework #2 -Chem
Predict the chemical formula for the ionic compound formed by NH₄⁺ and PO₄³⁻
(NH₄)₃PO₄
How many oxygen atoms are in 32 molecules of dinitrogen tetroxide, N₂O₄?
128
What is the mass number for an atom of Xenon containing 54 protons and 80 neutrons?
134
How many protons are in an atom of Fe?
26
How many hydrogen atoms are in three formula units of ammonium benzoate, C₆H₅COONH₄?
27
What is the atomic number for an element whose mass number is 78 and contains 46 neutrons?
32
What is the mass number of Zinc-68?
68
Predict the chemical formula for the ionic compound formed by the elements Al and I.
AlI₃
Provide the correct IUPAC name for AlBr₃.
Aluminum Bromide
Provide the correct IUPAC name for AlI₃
Aluminum Iodide
Provide the correct IUPAC name for Al₂O₃.
Aluminum Oxide
Predict the chemical formula for the ionic compound formed by the ions Ba²⁺ and C₂H₃O₂⁻.
Ba(C₂H₃O₂)₂
Write the chemical formula for Barium Hydroxide Octahydrate
Ba(OH)₂•8H₂O
Provide the correct IUPAC name for BaCl₂.
Barium Chloride
Write the chemical formula for Carbon Tetrafluoride
CF₄
Glucose is an important biological molecule with the molecular formula C₆H₁₂O₆. What is its empirical formula?
CH₂O
Write the chemical formula for Carbon Disulfide
CS₂
Predict the chemical formula for the ionic compound formed by the ions Ca²⁺ and CO₃²⁻
CaCO₃
Write the chemical formula for Calcium Chloride Dihydrate
CaCl₂•2H₂O
Provide the correct IUPAC name for CaH₂.
Calcium Hydride
Provide the correct IUPAC name for CrBr₃.
Chromium (III) Bromide
Provide the correct IUPAC name for CrF₄.
Chromium (IV) Fluoride
Which of the following compounds does NOT exhibit covalent (molecular) bonding?
CoCl₂
Provide the correct IUPAC name for CoCl₂.
Cobalt (II) Chloride
Provide the correct IUPAC name for CoO.
Cobalt (II) Oxide
Provide the correct IUPAC name for CoS.
Cobalt (II) Sulfide
Provide the correct IUPAC name for Cu₃P.
Copper (I) Phosphide
Write the chemical formula for Chromium (III) Cyanide
Cr(CN)₃
Write the chemical formula for Chromium (III) Phosphate.
CrPO₄
Predict the chemical formula for the ionic compound formed by the elements Cs and P.
Cs₃P
Predict the chemical formula for the ionic compound formed by the ions Cu²⁺ and Cl⁻.
CuCl₂
Predict the chemical formula for the ionic compound formed by Cu²⁺ and P³⁻
Cu₃P₂
Write the empirical formula corresponding to C₆H₄Cl₂
C₃H₂Cl
Write the empirical formula corresponding to C₈H₁₀
C₄H₅
Write the chemical formula for Acetic Acid
HC₂H₃O₂
Write the chemical formula for Nitric Acid
HNO₃
Write the chemical formula for Carbonic Acid
H₂CO₃
Write the chemical formula for Sulfuric Acid
H₂SO₄
Which has the incorrect name-formula combination?
Iodine Trifluoride - IF
Classify the following compound as covalent (molecular) or ionic: LiBr
Ionic
Write the chemical formula for Iridium (III) Bromide Tetrahydrate
IrBr₃•4H₂O
Provide the correct IUPAC name for IrO₂.
Iridium (IV) Oxide
Provide the correct IUPAC name for Fe₃P₂.
Iron (II) Phosphide
Which has the incorrect name-formula combination?
Iron (III) Hydroxide - Fe₃OH
Provide the correct IUPAC name for Pb₃N₂.
Lead (II) Nitride
Which has the correct name-formula combination?
Manganese (II) Sulfide - MnS
Provide the correct IUPAC name for (Hg₂)₃P₂
Mercury (I) Phosphide
Provide the correct IUPAC name for Hg₂S.
Mercury (I) Sulfide
Provide the correct IUPAC name for HgCl₂.
Mercury (II) Chloride
Classify the following compound as covalent (molecular) or ionic: P₂O₅
Molecular
Write the chemical formula for Nitrogen Trichloride
NCl₃
Predict the chemical formula for the ionic compound formed by the ions Na⁺ and SO₄²⁻.
Na₂SO₄
Provide the correct IUPAC name for NiN.
Nickel (III) Nitride
Write the chemical formula for Dinitrogen Monoxide
N₂O
Which two particles of the atom have nearly identical masses?
Proton and Neutron
The nucleus of an atom contains?
Protons and Neutrons
Write the chemical formula for Diphosphorus Pentoxide
P₂O₅
Provide the correct IUPAC name for Rb₃N.
Rubidium Nitride
What element with a mass number of 100 has 56 neutrons in its nucleus?
Ruthenium (Ru)
Write the chemical formula for Sulfur Tetraiodide
SI₄
Provide the correct IUPAC name for Ag₂O
Silver Oxide
Which is not one of Dalton's Hypotheses of atomic theory?
The atoms of one element are the same as atoms of another element.
The Millikan Oil drop experiment determined?
The charge of the electron.
The Cathode ray tube experiment determined?
The existence of electrons.
When methane is completely combusted in oxygen forming carbon dioxide and water, how does the mass of the reactant gases compare to the products?
The masses of the reactants and products are equal.
The atomic mass of Germanium (Ge) on the periodic table is 72.630 amu. Which of the following best explains why the atomic mass is a fraction between 72 and 73?
The presence of different isotopes.
Atoms from which of the following pairs are most likely to form an ionic bond?
Titanium and Oxygen
What does the mass number of an atom represent?
Total number of Protons and Neutrons in the atom.
What is the atomic symbol and mass number for an atom containing 50 protons and 64 neutrons?
¹¹⁴Sn
There are two naturally occurring isotopes of Europium, ¹⁵¹Eu (151.0 amu) and ¹⁵³Eu (153.0 amu). If the atomic mass of Eu is 151.96, what is the approximate natural abundance of ¹⁵¹Eu?
50%
An unknown element X has the following isotopes: ⁵²X (84.50% abundant), ⁴⁹X (8.00% abundant), ⁵⁰X (7.50% abundant). What is the approximate atomic mass of X?
51.6 amu
Write the chemical formula for Chromium (VI) Sulfate.
Cr(SO₄)₃
In an experiment, the reaction of 100.0g of Iodine produced 144.9g of a compound formed from Iodine and Fluorine. a. What mass of Fluorine was consumed in the reaction? b. What is the mass ratio of Iodine to Fluorine in the compound? c. Given that the mass ratio of Iodine to Fluorine is 2.23, what is the mass in grams of this compound would be expected to form in the same experiment if you started with 85.2g of Iodine?
a. 44.9 g b. 2.23 c. 123.4g
The empirical formula of a covalent compound is CH₂. Which of the following is NOT a possible chemical formula for this compound?
C₆H₁₀
Provide the correct IUPAC name for CoN.
Cobalt (III) Nitride
