Gen Chem Study Guide
A. WORK-OUT PROBLEMS:
Write formulas for the following: calcium nitrate phosphorous pentafluoride aluminum carbonate strontium hydroxide methane potassium oxide lithium chloride barium sulfate phosphate ion dinitrogen tetroxide
Give the complete electron configurations of: S, O2-, and Mn.
For the following molecules/ions, give the Lewis structure, molecular geometry, and electron pair geometry:
NO2- SF4
Write Lewis structures to represent all resonance forms of CO32-.
5. How many joules of heat energy are lost when a 100-gram sample of a metal (with a specific heat of 0.312 J/(gºC) cools from 80.0ºC to 30.0ºC?
Calculate the number of moles in:
4.20 X 1024 molecules of SO2
240 grams of NaOH
5.00 liters of H2 gas at 0ºC and 1.00 atm.
1.7 liters of Ar gas at STP
7. How many grams of AlCl3 can be prepared from 50.0 g of Al and 100.0 g of Cl2 according to the equation: 2 Al + 3 Cl2 2 AlCl3 ?
How many neutrons are there in 131I?
Which bond is the most polar? I-Cl I-Br I-S I-I
Circle the molecules that are polar (have a dipole moment):
CCl4 CH4 H2O NH3 HBr CHCl3 CCl2F2
How many unpaired electrons does the Si atom have?
Write the correct Lewis structure for CS2.
Write the formal charges on each atom in [F-S=F]2+ (lone pairs are not shown).
How many ions are formed when Ca3(PO4)2 dissolves?
How many protons, neutrons, and electrons are there in 19F- ion?
Discuss the properties of molecules used as liquid crystals. (ignore this question)
What is the molarity of the solution made when 1.25 grams of sodium chloride are dissolved in 500 mL of water?
What is the hybridization of the carbon atom C2H2 ?
What is the molecular formula of a compound with 30.5% N and 69.5% S, and it has a molar mass of 184 g/mol?
How many electrons are found at the sublevel 1=2?
How many sigma and how many pi bonds does carbon dioxide have?
How many milliliters of 2.5M
Write formulas for the following: calcium nitrate phosphorous pentafluoride aluminum carbonate strontium hydroxide methane potassium oxide lithium chloride barium sulfate phosphate ion dinitrogen tetroxide
Give the complete electron configurations of: S, O2-, and Mn.
For the following molecules/ions, give the Lewis structure, molecular geometry, and electron pair geometry:
NO2- SF4
Write Lewis structures to represent all resonance forms of CO32-.
5. How many joules of heat energy are lost when a 100-gram sample of a metal (with a specific heat of 0.312 J/(gºC) cools from 80.0ºC to 30.0ºC?
Calculate the number of moles in:
4.20 X 1024 molecules of SO2
240 grams of NaOH
5.00 liters of H2 gas at 0ºC and 1.00 atm.
1.7 liters of Ar gas at STP
7. How many grams of AlCl3 can be prepared from 50.0 g of Al and 100.0 g of Cl2 according to the equation: 2 Al + 3 Cl2 2 AlCl3 ?
How many neutrons are there in 131I?
Which bond is the most polar? I-Cl I-Br I-S I-I
Circle the molecules that are polar (have a dipole moment):
CCl4 CH4 H2O NH3 HBr CHCl3 CCl2F2
How many unpaired electrons does the Si atom have?
Write the correct Lewis structure for CS2.
Write the formal charges on each atom in [F-S=F]2+ (lone pairs are not shown).
How many ions are formed when Ca3(PO4)2 dissolves?
How many protons, neutrons, and electrons are there in 19F- ion?
Discuss the properties of molecules used as liquid crystals. (ignore this question)
What is the molarity of the solution made when 1.25 grams of sodium chloride are dissolved in 500 mL of water?
What is the hybridization of the carbon atom C2H2 ?
What is the molecular formula of a compound with 30.5% N and 69.5% S, and it has a molar mass of 184 g/mol?
How many electrons are found at the sublevel 1=2?
How many sigma and how many pi bonds does carbon dioxide have?
How many milliliters of 2.5M