Empirical and Molecular Formula
What is the difference between the molecular and empirical formula?
The empirical formula is a simplified version of a molecule's molecular formula.
In an ionic compound do metals lose or gain electrons?
Metals lose electrons
What is the molecular shape and notation for an atom that has 2 bonding domains and 1 nonbonding domain?
Bent and AX2E
What is the hybridization of a linear molecule?
sp
What is the strongest intramolecular force?
ionic bonds
What is the empirical formula of a compound with 85.7% carbon and 14.3% hydrogen?
- pg 361 McQuarrie
CH2
What is the difference between ionic and covalent compounds?
Ionic compounds do not share electrons covalent compounds share electrons
What is the geometry and molecular shape for NH3?
Geometric shape is tetrahedral but its molecular shape is trigonal pyramidal
What is the formula for calculating bond order from hybridization?
1/2 (bonding - antibonding)
What is the difference between intramolecular forces and intermolecular forces?
Intramolecular forces are bonds formed within a molecule, intermolecular forces are bonds formed between molecules
If C3H8O has a molecular mass of 60.09 what is its molecular formula?
-357-358 McQuarrie
C3H6O, molecular mass equal the mass of the empirical formula [the empirical formula is the molecular formula]
What is the correct name for the following compounds: MgS2 and NF3
Magnesium Sulfide and Nitrogen TriFluoride
Why does a bent molecule (with two bonding domains and one nonbonding domain) have smaller bond angles than a trigonal planar molecule?
Stronger electron repulsion between lone pairs and domains
How many pi and sigma bonds are between the two nitrogen atoms?
Link: https://docs.google.com/document/d/1YudhG7UlXeUcNHsKAPsJ2G3LNLsqno9QDh-eCLJqzGY/edit?usp=sharing
2 pi, 1 sigma
Vander Waals interactions occur between what type of molecules?
All of them
If CH2 has a mass of 42g what is its molecular formula?
362- McQuarrie
C3H6 [CH2 has a mass of 14g, if we divide 42g by 14g we get the number three, the three is a factor that we have to multiply all the coefficients by]
What are polyatomic ions? Give the name and molecular formula for three
Ions that are bonded covalently [List on polyatomic anions = (ammonium) NH4+ (hydronium) H3O+ cations = (acetate) CH3COO- (cyanide) CN- (hydroxide) OH- (nitrate) NO3- carbonate (CO3-)(peroxide) O22- (sulfate) SO4
How many nonbonding and bonding domains are there for the molecule BeCl2?
Two bonding domains and zero nonbonding domains
Which bonds are stronger, double or single?
Double bonds
What are covalent bonds? What is the difference between a polar covalent bond and a non-polar covalent bond?
covalent bonds occur when electrons are shared between atoms
A non- polar covalent bond has no dipole [electronegative forces are relatively equal throughout the entire molecule]
A polar covalent bond has a dipole
How many grams of oxygen and carbon are present in 230.0 grams of CO2?
62.73g of C, 167.3 g of O
Which are stronger ionic or covalent bonds? Why?
Ionic, electrons are not shared [larger electronegativity]
How is molecular shape different from geometry?
molecular shape, however, is influenced by the presence of nonbonding domains
As bond length increases, how is the strength of the bond impacted?
An increase in bond length decreases the bond's strength
What is a dipole-dipole interaction?
Interactions between two polar molecules