Chem Ch4
Which of the following represents the type of compound and the name for the following substance: Fe2O3 A. Ionic Compounds with a Polyatomic Ion: iron oxide B. Type II Ionic: iron(III) oxide C. Type II Ionic: iron(II) oxide D. Binary Covalent (type III): di-iron trioxide
B. Type II Ionic: iron(III) oxide
How many significant figures are in 21.68? A 3 significant figures B. 5 significant figures C. 4 significant figures D. 6 significant figures E. 2 significant figures
C. 4 significant figures
Choose the element which requires the LEAST amount of energy to form a +1 ion. A. Ne B. Cl C. K D. N E. He F. Na
C. K
When an element in the IIA column (Be, Mg, Ca, ...represented below by the letter M) reacts with an element in the VA column (N, P, As, ... represented below by the letter X) what is the formula of the compound that forms? A. M₃X B. MX₂ C. M₃X₂ D. MX E. MX₃ F. M₂X₃ G.M₂X
C. M₃X₂
Zinc always forms an ion with a 2+ charge. What will the configuration of this element be? A. [Ar]4s²3d¹⁰ B. [Ar]4s²3d⁸ C. [Ar]3d¹⁰ D. [Ar]4s²3d¹⁰4p² E. [Ar] F. [Kr]
C. [Ar]3d¹⁰
Determine the ionic charge of the positive ion in the following ionic compound. (Write only the number) (NH₄)₂CO₃
⁺1
Determine the ionic charge of the positive ion in the following ionic compound. Co(NO₃)₂
⁺2
Determine the ionic charge of the positive ion in the following ionic compound. Ni₃(PO₄)₂
⁺2
Determine the ionic charge of the positive ion in the following ionic compound. SnBr₂
⁺2
Determine the ionic charge of the positive ion in the following ionic compound. MnO₂
⁺4
What is the typical ion charge formed by Ca? How is that ion formed? A. -2 by losing two electrons B. +2 by losing two electrons C. -2 by gaining two electrons D. +2 by gaining two electrons
B. +2 by losing two electrons
How many significant figures are in 0.00991? A 2 significant figures B. 3 significant figures C. 4 significant figures D. 5 significant figures E. 6 significant figures
B. 3 significant figures
After the change in part 2 occurs, what element will the ion of Ca be isoelectric to (or have the same number of electrons as) A. Titanium (Ti) B. Argon (Ar) C. Krypton (Kr) D. Calcium (Ca: the number of electrons does not change)
B. Argon (Ar)
Choose the species that are isoelectronic with - Se²⁻- A. Ar, P³⁻, S²⁻, Cl⁻ B. As³⁻, Br⁻, Kr C. Ga³⁺, Ca²⁺, K⁺, Ar
B. As³⁻, Br⁻, Kr
After the change in part 2 occurs, what element will the ion of Bromine be isoelectric to (or have the same number of electrons as) A. Selenium (Se) B. Krypton (Kr) C. Argon (Ar) D. Bromine (Br: the number of electrons does not change)
B. Krypton (Kr)
Choose the set of elements that would form a compound having the formula MX where M represents the metallic element and X the nonmetallic element. A. Mg and P B. Sr and O C. Al and Cl D. Ga and Se E. Na and N F. K and S
B. Sr and O
How many electrons are present in one ion having the symbol ¹⁷N³⁻ ?
10 electrons
How many neutrons are present in one ion having the symbol ¹⁷N³⁻ ?
10 neutrons
What is the total number of ions present in one formula unit of (NH₄)₃PO₄?
2
How many km³ are equal to 2.6 cm³?
2.6 x 10⁻¹⁵ km³
What is the total number of atoms present in one formula unit of (NH₄)₃PO₄?
20
How many mm³ are equal to 5.1 km³?
5.1 x 10¹⁸ mm³
How many protons are present in one ion having the symbol ¹⁷N³⁻ ?
7 protons
What is the typical ion charge formed by Br? How is that ion formed? A. -1 by gaining one electron B. -1 by losing one electron C. +1 by gaining one electron D. +1 by losing one electron
A. -1 by gaining one electron
Which of the following represents the type of compound and the name for the following substance: CaSO₄ A. Ionic Compounds with a Polyatomic Ion: Calcium Sulfate B. Binary Ionic Compounds (type I): calcium sulfide C. Binary Covalent (type III): calcium sulfur tetroxide D. Ionic Compounds with a Polyatomic Ion: calcium monosulfur tetroxide E. Type II Ionic: calcium(II) sulfate
A. Ionic Compounds with a Polyatomic Ion: Calcium Sulfate
We will be working on naming the following compounds: Na2O CaSO4 Fe2O3 N2O5 HClO4 Which of the above substances are ionic, and which are covalent? A. Ionic: Na2O, (NH4)2SO4, Fe2O3 Covalent: N2O5, HClO4 B. Ionic: N2O5, HClO4 Covalent: Na2O, (NH4)2SO4, Fe2O3 C. Ionic: N2O5 Covalent: Na2O, (NH4)2SO4, Fe2O3, HClO4 D. Ionic: N2O5, (NH4)2SO4, Fe2O3, HClO4 Covalent: Na2O E. Ionic: N2O5, HClO4, (NH4)2SO4 Covalent: Na2O, Fe2O3
A. Ionic: Na2O, (NH4)2SO4, Fe2O3 Covalent: N2O5, HClO4
Choose the species that are isoelectronic with - Na⁺- A. Ne, Mg²⁺, Al³⁺ B. He, H⁺, Li⁺, Be²⁺ C. Ar, P³⁻, S²⁻, Cl⁻
A. Ne, Mg²⁺, Al³⁺
Which of the following represents the type of compound and the name for the following substance: Na₂O A. Type I (Binary) Ionic: sodium oxide B. Type I (Binary) Ionic: disodium oxide C. Type I (Binary) Ionic: sodium oxygen D. Binary Covalent (type III): sodium oxide E. Binary Covalent (type III): disodium oxide F. Type II Ionic: sodium(I) oxide
A. Type I (Binary) Ionic: sodium oxide
In ___ g of potassium (K) there are 2.036 x 10²⁴ K atoms. A. 43.01 B. 75.25 C. 20.57 D. 132.2 E. 36.00 F. 63.00
D. 132.2 (Eq: (2.036 x 10²⁴ / 6.022 x 10²³) x 39.0983 g/mol of K)
Choose all of the images that represent chemical changes and none that represent physical changes. A. B, C B. A, B, C C. B, C, D D. A, D, E E. D, E F. A, E G. A, C, D
D. A, D, E
Which of the following represents the type of compound and the name for the following substance: N2O5 A. Type I (Binary) Ionic: nitrogen oxide B. Type II Ionic: nitrogen(V) oxide C. Binary Covalent (type III): nitrogen pentoxide D. Binary Covalent (type III): dinitrogen pentoxide
D. Binary Covalent (type III): dinitrogen pentoxide
How many significant figures are in 2.72257 x 10⁴? A 2 significant figures B. 3 significant figures C. 4 significant figures D. 5 significant figures E. 6 significant figures
E. 6 significant figures
Which of the following represents the type of compound and the name for the following substance: HClO₄ A. Ionic Compounds with a Polyatomic Ion: hydrogen perchlorate B. Binary Covalent (type III): hydrogen monochlorine tetroxide C. Acid: hydroperchloric acid D. Acid: perchlorous acid E. Acid: perchloric acid F. Type II Ionic: hydrogen(I) perchlorate
E. Acid: perchloric acid
Choose the element which releases the GREATEST amount of energy to form a -1 ion. A. Na B. K C. S D. Cs E. Cl
E. Cl
When an element in the IIIA column (B, Al, Ga, ...represented below by the letter M) reacts with an element in the VIIA column (F, Cl, Br, ... represented below by the letter X) what is the formula of the compound that forms? A. M₃X B. MX₂ C. M₃X₂ D. MX E. MX₃ F. M₂X₃ G.M₂X
E. MX₃
