Chem 161 Homework Chapter 4
What is the name of this compound? CO
carbon monoxide
What is the name of the compound P₄O₁₀
tetraphosphorus decoxide
When bonds are formed, energy is released. In a water molecule, the two hydrogens are both bonded by single bonds to the central oxygen atom. The bond energy associated with an O-H bond is 463 kJ/mol. Again, using the balanced chemical equation shown above, how much energy is released in forming the O-H bonds?
1850 kJ
In an oxygen molecule, the two oxygen atoms are held together by a double bond with a bond energy of 495 kJ/mol. Using the balanced chemical equation (shown above), how much energy must be expended in breaking the O=O bonds?
496 kJ
In a hydrogen molecule, the two hydrogen atoms are held together by a single bond with a bond energy of 436 kJ/mol of hydrogen. In other words, to break the H-H bonds in one mole of molecular hydrogen requires the expenditure of 436 kJ of energy. Using the balanced chemical equation for the formation of water from oxygen and hydrogen (shown above), and interpreting the stoichiometric coefficients as mole amounts, how much energy must be expended in breaking the H-H bonds?
872 kJ
Chemical bonds hold atoms together in molecules. To break apart the atoms in a molecule requires energy sufficient to overcome the attractive force holding the atoms together. Based on this statement, when we break a chemical bond energy is _______.
Absorbed
Which of the following molecules contain an atom with an expanded octet? Choose one or more: A. ONF₃ B. SeO₂F₂ C. XeF₂ D. GeCl₃
B, C
What is the molecular formula for acetic acid?
CH3COOH
Give the formula for Covellite, copper(II) sulfide
CuS
Give the formula of Cuprite, copper(i) oxide
Cu₂O
Give the formula for Chalcocite, copper(I) sulfide
Cu₂S
What is the chemical formula for lithium bicarbonate?
LiHCO₃
What is the name of this compound? NCl₃
Nitrogen trichloride
What is the chemical formula for Strontium nitrate
Sr(NO₃)₂