Answer the following question given this paragraph: Since sodium fluoride is soluble, the sodium ion is a spectator ion in the neutralization reaction. The fluoride ion is capable of reacting, to a small extent, with water, accepting a proton. Q: What is the role of the sodium ion in the neutralization reaction of sodium flouride? Choices: - reflection ion - circuit ion - team ion - spectator ion A:
spectator ion
(Question)
Answer the following question given this paragraph: Penguins are flightless birds that are strong swimmers and spend much of their time in the water. Q: What are flightless birds that are strong swimmers and spend much of their time in the water? Choices: - Emus - Ostriches - Cassowaries - penguins A:
(Answer)
penguins
Ques: Answer the following question given this paragraph: Single-displacement reactions are a subset of redox reactions. In this subset, what is oxidized and what is reduced? Give an example of a redox reaction that is not a single-displacement reaction. Q: Single-displacement reactions are a subset of what? Choices: - gravitational reactions - kinetic reactions - particle reactions - redox reactions A:
Ans: redox reactions
(Q).
Answer the following question given this paragraph: Space may seem empty, but actually it contains thinly spread gas and dust, called interstellar medium, that gradually collapses over immense stretches of time and collects into denser clouds of gas and dust. The atoms of gas are mostly hydrogen and are typically about a centimeter apart. The dust is mostly carbon and silicon. In some places, this interstellar medium is collected into particularly dense clouds of gas and dust known as a nebula . A nebula is the birthplace of stars. Our sun was probably born in a nebula around 5 billion years ago. Q: What does interstellar medium consist of? Choices: - gravitational waves - the strong force - dark matter - thinly spread gas and dust A:
(A).
thinly spread gas and dust
Ques:Answer the following question given this paragraph: Hybridization involves only bonds, lone pairs of electrons, and single unpaired electrons (radicals). Structures that account for these features describe the correct hybridization of the atoms. However, many structures also include resonance forms. Remember that resonance forms occur when various arrangements of bonds are possible. Since the arrangement of bonds involves only the unhybridized orbitals, resonance does not influence the assignment of hybridization. For example, molecule benzene has two resonance forms (Figure 8.26). We can use either of these forms to determine that each of the carbon atoms is bonded to three other atoms with no lone pairs, so the correct hybridization is sp2. The electrons in the unhybridized p orbitals form bonds. Neither resonance structure completely describes the electrons in the bonds. They are not located in one position or the other, but in reality are delocalized throughout the ring. Valence bond theory does not easily address delocalization. Bonding in molecules with resonance forms is better described by molecular orbital theory. (See the next module. Q: Bonding in molecules with resonance forms is better described by which theory? Choices: - Geiger theory - string theory - Pascal's theory - molecular orbital theory A:

Ans:molecular orbital theory
Question: Answer the following question given this paragraph: Q: What is the name of anything that has mass and takes up space? Choices: - solid - carbon - depth - matter A:
Answer:
matter