What is the mass percent of carbon in oxalic acid, H2C2O4?
A) 2.24
B) 13.3
C) 26.7
D) 34.5
E) none of the above
Answer: C
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Chemistry Chapter 6
- A positively charged ion results from _________ electrons.
- A _______ is a mutual electrical attraction between the nuclei and valence electrons of different atoms that binds the atoms together.
- When two or more valid Lewis structures can be drawn for a molecule we get what is called __________.
- Hydrogen bonding can occur when hydrogen is covalently bonded to a highly ___________ atom.
- London dispersion forces are the result of the movement of __________.
- When one atom has a higher electronegativity than the other a __________ covalent bond will result.
- Electrons are shared equally in ________ covalent bonds.
- A charged group of covalently bonded atoms is called a ___________.
- A ___________ is created by equal but opposite charges that are separated by short distance.
- A __________ is a neutral group of atoms held together by covalent bonds.
- A _________ bond joins atoms together by sharing electrons.
- The strength of metallic bonds is given by ____________.
- Valence electrons in metal atoms can be modeled as
- Ionic compounds are electrically
- Whether a bond will be ionic or covalent depends on the difference in __________ of the atoms involved.
- Negatively charged ions are called
- What is the mass percent of oxygen in sodium oxide?
- What is the mass percent of Na in sodium chloride?
- Given that sodium chloride is 39.0% sodium by mass, how many grams of sodium chloride are needed to have 950 mg of Na present?
- How many moles of oxygen are in 3.30 moles of NaClO4 ?
- What is the mass (in grams) of 3.03 × 1024 molecules of carbon dioxide molecules?
- What is the mass (in grams) of 1.95 moles of water ?
- How many atoms of lithium are in 18.7 g?
- What is the mass of 3.91 x 1024 sulfur atoms?
- How many moles of potassium are in 156.4 g?