In comparing a balloon containing 25 grams of helium to a balloon containing 25 grams of neon, which one of the following statements is TRUE?
A) Each balloon has an equal number of atoms.
B) The helium balloon has more atoms.
C) The neon balloon has more atoms.
D) This scenario cannot happen because gases have no mass.
E) none of the above
Answer: B
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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?