A
Charge on the barium ion?
What is 2+?
The minimum energy needed to remove an electron from the atom in the gas phase
What is the first ionization energy?
Which of the following is classified as a metal?
(a) Ge
(b) As
(c) F
(d) V
(e) Ar
(d) V
Which one of the following salts is insoluble?
(a) NH4Cl
(b) Ca(NO3)2
(c) BaCO3
(d) Na2S
(e) Zn(CH3COO)2
(c) BaCO3
The number 0.0006236 has how many significant figures?
What is 4
How many electrons does strontium have to give up to achieve a noble-gas electron configuration
What is 2?
The energy change upon adding an electron to an atom in the gas phase, forming an anion.
What is electron affinity.
The atom having the valence-shell configuration 4s2 4p5 would be in what group and period?
Group VIIA and Period 4
Which one of the following is likely to be the most soluble base?
(a) Ca(OH)2
(b) Cu(OH)2
(c) Ga(OH)3
(d) Zn(OH)2
(e) Zr(OH)3
(a) Ca(OH)2
Which is the strongest acid?
(a) HClO4
(b) HClO3
(c) HClO2
(d) HClO
(e) HF
(a) HClO4
Which of the following occurs in an ionic bond?
a. Oppositely charged ions attract.
b. Two atoms share two electrons.
c. Two atoms share more than two electrons.
d. Like-charged ions attract.
a. Oppositely charged ions attract.
In an isoelectronic series size _______ with increasing nuclear charge.
What is decrease
The oxidation number of carbon in K2CO3
What is +4
Which of the following statements is FALSE given the following net ionic equation?
2H+(aq) + Cu(OH)2(s) Cu2+(aq) + 2H2O(l)
(a) If all the water evaporated away, the salt remaining could possibly be CuS.
(b) The acid involved must be a strong electrolyte.
(c) The base, Cu(OH)2, is an insoluble base.
(d) This could be the net ionic equation for HNO3 reacting with Cu(OH)2.
(e) This is classified as a neutralization reaction.
(a) If all the water evaporated away, the salt remaining could possibly be CuS.
Which of the following that are chemical changes and not physical changes? I. freezing of water; II. rusting of iron; III. dropping a piece of iron into hydrochloric acid (H2 is produced); IV. burning a piece of wood; V. emission of light by a kerosene oil lamp
II. rusting of iron; III. dropping a piece of iron into hydrochloric acid (H2 is produced); IV. burning a piece of wood; V. emission of light by a kerosene oil lamp
Use VSEPR theory to predict the molecular geometry of BH3. a. triangular planar
What is triangular planar
Effective nuclear charge experienced by valence electrons _________ as we move left to right across a period.
What is increases
How much heat is absorbed in the complete reaction of 3.00 grams of SiO2 with excess carbon in the reaction below? ΔHo for the reaction is +624.7 kJ.
SiO2(s) + 3C(s) SiC(s) + 2CO(g)
31.2 kJ
A compound contains, by mass, 40.0% carbon, 6.71% hydrogen, and 53.3% oxygen. A 0.320 mole sample of this compound weighs 28.8 g. The molecular formula of this compound is:
C3H6O3
Nitric acid is a very important industrial chemical: 1.612 x 1010 pounds of it were produced in 1992. If the density of nitric acid is 12.53 pounds/gallon, what volume would be occupied by this quantity? (1 gallon = 3.7854 liters)
4.870 x 109 liters
NH3 is polar or nonpolar?
What is polar
What is the frequency of light having a wavelength of 4.50 x 10-6 cm? (h=6.63x10-34; E=hv; c=λv)
6.67 x 1015 s-1
Calculate the standard reaction enthalpy for the synthesis of hydrogen chloride gas using the data below.
-184.7 kJ
What volume of 0.50 M KOH would be required to neutralize completely 500 mL of 0.25 M H3PO4 solution?
7.5 x 102 mL
How many grams of Ca(OH)2 are contained in 1500 mL of 0.0250 M Ca(OH)2 solution?
2.78 g