Answer the following question given this paragraph: Methanoic acid and ethanoic acid are also called formic acid and acetic acid, respectively. Formic acid is the compound that makes certain ant bites sting, while acetic acid is the active substance in vinegar. How acidic are carboxylic acids? It turns out that they are not very acidic. No carboxylic acid is on the list of strong acids (Table 12.2 "Strong Acids and Bases"). (For more information about strong acids, see Chapter 12 "Acids and Bases", Section 12.4 "Strong and Weak Acids and Bases and Their Salts". ) This means that all carboxylic acids are weak acids. A 1 M solution of formic acid is only about 1.3% dissociated into H+ ions and formate ions, while a similar solution of acetic acid is ionized by about only 0.4%. Some carboxylic acids are strongerfor example, trichloroacetic acid is about 45% dissociated in aqueous solution. But no carboxylic acid approaches the 100% dissociation amount required by the definition of a strong acid. As their name suggests, however, carboxylic acids do act like acids in the presence of bases. The H atom in the carboxyl group comes off as the H+ ion, leaving acarboxylate anion:. Q: What is the more common term for ethanoic acid, the active substance in vinegar? Choices: - methyl acid - amino acid - polymer acid - acetic acid A:
acetic acid
(Question)
Answer the following question given this paragraph: As erosion by groundwater continues, the ceiling of a cave may collapse. The rock and soil above it sink into the ground. This forms a sinkhole on the surface. You can see an example of a sinkhole in Figure below . Some sinkholes are big enough to swallow vehicles and buildings. Q: What is formed when the ceiling of an underground cave collapses? Choices: - hill - groundwater - mountain - sinkhole A:
(Answer)
sinkhole
Ques: Answer the following question given this paragraph: Vertebrates have a backbone, but invertebrates do not. Except for the chordates, all animal phyla consist only of invertebrates. Chordates include both vertebrates and invertebrates. Q: What do vertebrates have which invertebrates do not? Choices: - appendages - fangs - tails - backbones A:
Ans: backbones
(Q).
Answer the following question given this paragraph: Figure 20.2 The rate of flow of charge is current. An ampere is the flow of one coulomb through an area in one second. Q: The rate of flow of charge in an electrical circuit is known as what? Choices: - output - voltage - velocity - current A:
(A).
current
Ques:Answer the following question given this paragraph: sulfate is used as a cleaning agent because it is water soluble and acidic. Q: Sulfate is used as a cleaning agent because it is acidic and soluble in what substance? Choices: - air - salt - oxygen - water A:

Ans:water
Answer the following question given this paragraph: Nonvascular plants are low-growing, reproduce with spores, and need a moist habitat. Q: What do nonvascular plants reproduce with? Choices: - photosynthesis - toxins - vascular plants - spores A:
spores