Trends
Define electronegativity
The ability of an atom to gain an electron
How many atoms of H are in .250 kg of (CH3)2SO
1.16E25
Which of the following is/are not true?
a) Neon is a noble gas, nonmetal, and main group element
b) Calcium is a main-group and alkaline earth metal
c) Iron is a transition metal and the main group element
d) Bromine, Nonmetal, main group element, halogen
e) Uranium, U is an inner transition metal
c) Iron is a transition metal and the main group element
FeSO4 x 7H2O
iron(II) sulfate heptahydrate.
Find the empirical formula for C6H10
C3H5
Which of the following has the largest atomic radius?
Na, Mg, S, Li, C
Na
Determine the amount of atoms in 25.0g of sodium carbonate decahydrate
1.89x1025
Draw the most favorable lewis dot structure for CH2F2. Which of the following statements is/are not true
a. there are 6 non-bonding electrons on the F atom.
b. There are 4 bonding groups around the central C atom.
c. Each H atom has a duet of two electrons.
d. There are 12 lone pairs of electrons in the molecule.
d. There are 12 lone pairs of electrons in the molecule.
Mg(H2PO4)2
Magnesium dihydrogen phosphate
What is the % hydrogen by mass in ammonium hydrogen phosphate?
6.87%
Which of the following statements is true?
a) Br has a larger radius than Br-.
b) Ca2+ has a larger radius than Ca.
c) The following species are listed in order of decreasing radius: S2- > Ar > K+
d) The radius of Ar is larger than the radius of Cl-.
C) The following species are listed in order of decreasing radius: S2- > Ar > K+
How many molecules of benzene (C6H6) are in 2.1 L. The density of benzene is 0.876 g/mL
1.42E25
Consider V, Mo, Cl, As, B. Which has 5 valence electrons?
V and As
P2Br4
diphosphorus tetrabromide
Which of the following is not a correct name and formula?
a) Manganese(IV) sulfide MnS2
b) Sodium phosphide Na3P
c) Tin(IV) chloride SnCl4
d) Calcium nitride Ca3N2
e) Cobalt(III) oxide Co3O2
f) Vanadium(V) oxide V2O5
e) Cobalt (III) oxide Co3O2
Which of the following is/are true?
a) A neutral Ca atom is larger than a neutral Cl atom
b) Cl- is smaller than a neutral Cl atom
c) Cl- is smaller than Ca2+
a) A neutral Ca atom is larger than a neutral Cl atom
A 6.25 g sample of a compound of phosphorus and oxygen contains 3.52 g of phosphorus. The compound has a molar mass of approximately 220 g/mol. What is the molecular formula of the compound?
P4O6
Which of the following is/are polar?
a) IF3
b) CH2F2
c) BF3
d) PF3
E) XeF4
a) IF3
b) CH2F2
c) PF3
Which of the following is/are named correctly?
a) CBr4 is monocarbon tetrabromide
b) ClF3 is chlorine trifluoride
c) S2Cl2 is disulfur dichloride
d) N2O is nitrogen dioxide
e) NO3 is nitrate
b) ClF3 is chlorine trifluoride
c) S2Cl2 is disulfur dichloride
A sample of a compound with a molar mass of 532 g/mol is found to be 40.634% C, 6.063% H, and 53.303% Cl. Find its empirical and molecular formula.
empirical: C9H16Cl4
molecular: C18H32Cl8
What is the molecular geometry given by the following:
4 bonding groups, 1 lone pair
seesaw
Combustion analysis of an 8.505g sample of a compound containing C,H,O produces 11.17g of carbon dioxide and 3.428 of water. What is the empirical formula for this compound?
C4H6O5
Which of the following ground-state electron configurations is correct?
a) Po: [Rn]6s24f145d106p4
b) Cu:[Ar]4s14d10
c) Xe: [Kr]5s24d105p6
d) S: [Ne}2s22p4
e) Ge:[Ar]4s23d104p4
c) Xe: [Kr]5s24d105p6
Which of the following only has single bonds in its Lewis structure?
a) Ammonium ion
b) Nitrite ion
c) Hypochlorite ion
d) Hydroxide ion
a) Ammonium ion
c) Hypochlorite ion
d) Hydroxide ion
A Freon leak in the air conditioning system of an old car releases 2.08 g of CF2Cl2 per month. What mass of fluorine does this car emit into the atmosphere each year?
7.84 F/yr