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hybridization and VSEPR theory
Periodic trends
Stoichiometry
Molarity, etc.
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100
The structure of oxalic acid contains ____ sigma bonds and ____ pi bonds. see board for structure.
What is 7 sigma and 2 pi bonds?
100
Based on your knowledge of electronegativity trends, which covalent single bond is most polar? C—N, C—C, C—H, C—O
What is C-O?
100
What is the stoichiometric coefficient for oxygen when the following equation is balanced using the lowest, whole-number coefficients NH3(g) + O2(g) → N2(g) + H2O(g)
What is three?
100
What is the empirical formula for a substance that contains 81% fluorine and 19% carbon by mass?
What is C3F8?
100
The hybridization of orbitals on the central atom in a molecule is sp. The electron geometry of this central atom is?
What is linear?
200
Which ion has a noble gas configuration in its ground state? In+3, Al+3, Sn+2, Si+2, Bi+5
What is Al+3?
200
Based on reactivity trends of metals and nonmetals, which reaction would you expect to be the least vigorous? A. 2Na + I2 → 2NaI B. 2Cs + I2 → 2CsI C. 2Na + Br2 → 2NaBr D. 2Cs + Br2 → 2CsBr
What is A?
200
How many cations are in 10.0 g of sodium phosphate, Na3PO4?
What is 1.10 x 10^23 cations?
200
A solution of hydrochloric acid, HCl, has a concentration of 6.51 M. What volume of this solution contains 15.5 g of HCl?
What is 0.653 L?
200
The carbon/oxygen double bond includes a pi bond made from the overlap of an oxygen orbital and … see structure on board.
What is an atomic p orbital on carbon?
300
Consider the following three resonance structures for dinitrogen oxide, N2O. Based on formal charges, which contributes the most and which the least to the resonance hybrid? See board for structures.
What is III the most and I the least?
300
Predict which element in each of the following pairs has the larger first ionization energy. Na or Mg F or Cl
What is Mg and F?
300
If the percent yield for the following reaction is 75.0%, and 45.0 g of NO2 are consumed in the reaction, how many grams of nitric acid, HNO3(aq), are produced? 3 NO2(g) + H2O(l) → 2 HNO3(aq) + NO(g)
What is 30.8 grams?
300
Which of the following has the highest melting point? K2S, KCl, CaCl2, CaS
What is CaS?
300
Which third period element is indicated by the data below? 1st ionization energy:1260 2nd ionization energy:2567 3rd ionization energy:3872 4th ionization energy:4998 5th ionization energy:17,006 6th ionization energy:19,124 7th ionization energy:23,476 Al, Si, Ar, P, Cl
What is Si?
400
Which of the following molecules will exhibit delocalized pi bonding? CO2, N2H2, HCN, O3
What is O3?
400
Given the representation of a chlorine atom, which circle might represent a chloride anion, Cl−?
What is circle III?
400
What mass of platinum is contained in 17.45 g of the anti-cancer drug cisplatin, PtCl2(NH3)2, which has a molar mass of 300.1 g/mol?
What is 11.3 grams?
400
In an acid-base neutralization reaction 32.13 mL of a 0.450 M sodium hydroxide, NaOH, solution reacts with 50.00 mL of an oxalic acid, H2C2O4, solution. What is the concentration of the H2C2O4 solution? 2NaOH(aq) + H2C2O4 (aq) → 2H2O(l) + Na2C2O4(aq)
What is 0.145 M?
400
What is the electron geometry and molecular geometry of BrO2−?
What is tetrahedral and bent?
500
Place the following in the correct order by decreasing X—N—X bond angle, where N is the central atom. (largest angle first) A. NH4+ > NO2− > NH3 B. NO2− > NH3 > NH4+ C. NH3 > NH4+ > NO2− D. NH4+ > NH3 > NO2− E. NO2− > NH4+ > NH3
What is E?
500
Which of the compounds, C3H8, MgCl2, Zn(NO3)2, are expected to exist as molecules?
What is only C3H8?
500
Silver nitrate and aluminum chloride react with each other by exchanging anions: 3AgNO3(aq) + AlCl3(aq) → Al(NO3)3(aq) + 3AgCl(s) What mass in grams of AgCl (143.3 g/mol) is produced when 4.22 g of AgNO3 (169.9 g/mol) react with 7.73 g of AlCl3 (133.3 g/mol)?
What is 3.56 grams?
500
An element M reacts with chlorine to form MCl2, with oxygen to form MO, and with nitrogen to form M3N2. The most likely candidate for the element is Li, Al, Mg, Si
What is Mg?
500
The carbon/oxygen double bond includes a sigma bond made from the overlap of an oxygen orbital and …
What is a hybrid sp2 orbital on carbon?