Answer the following question given this paragraph: The smallest and lightest alcohols (methanol, ethanol, propanol) are completely soluble in water in all proportions. In a solution, the hydroxyl groups of alcohol molecules and the water molecules form hydrogen bonds with each other, resulting in complete miscibility. However, as the length of the carbon chain increases, the solubility decreases. The solubility of 1-butanol is 7.4 g per 100 g of water, while that of 1-pentanol is 2.7 g per 100 g water, and 1-octanol is 0.06 g per 100 g water. The carbon chain portion of the larger alcohol molecule is nonpolar and leads to the decreased solubility of the overall compound. Q: The smallest and lightest alcohols (methanol, ethanol, propanol) are completely soluble in? Choices: - gasoline - oil - argon - water A:
water
(Question)
Answer the following question given this paragraph: Formaldehyde is a gas at room temperature. Acetaldehyde boils at 20C; in an open vessel, it boils away in a warm room. Most other common aldehydes are liquids at room temperature. Q: What form does formaldehyde take at room temperature? Choices: - solid - liquids - plasma - gas A:
(Answer)
gas
Ques: Answer the following question given this paragraph: Light is a wave of changing electric and magnetic fields. Light waves are caused by disturbances in an electromagnetic field, like the acceleration of charged particles (such as electrons). Light has a dual nature; at times, it acts like waves, while at other times it acts like particles, called photons . Light travels through space at the maximum speed allowed by the laws of physics, called the speed of light. Light has no mass, but it carries energy and momentum. Fermat's principle states that light will always take the path that takes the least amount of time (not distance). Q: Fermat's principle states that what will always take the path that takes the least amount of time? Choices: - sound - wind - electricity - light A:
Ans: light
(Q).
Answer the following question given this paragraph: Q: Some plants can detect increased levels of what when reflected from leaves of encroaching neighbors? Choices: - water - oxygen - air - light A:
(A).
light
Ques:Answer the following question given this paragraph: Radio waves are the broad range of electromagnetic waves with the longest wavelengths and lowest frequencies. They are used for radio and television broadcasts, microwave ovens, cell phone transmissions, and radar. Q: What waves are the broad range of electromagnetic waves with the longest wavelengths and lowest frequencies? Choices: - sound - microwaves - light - radio A:

Ans:radio
Question: Answer the following question given this paragraph: Vascular Plants The vascular plants are the dominant and most conspicuous group of land plants. There are about 275,000 species of vascular plants, which represent more than 90 percent of Earth's vegetation. Several evolutionary innovations explain their success and their spread to so many habitats. Vascular Tissue: Xylem and Phloem The first fossils that show the presence of vascular tissue are dated to the Silurian period, about 430 million years ago. The simplest arrangement of conductive cells shows a pattern of xylem at the center surrounded by phloem. Xylem is the tissue responsible for long-distance transport of water and minerals, the transfer of water-soluble growth factors from the organs of synthesis to the target organs, and storage of water and nutrients. A second type of vascular tissue is phloem, which transports sugars, proteins, and other solutes through the plant. Phloem cells are divided into sieve elements, or conducting cells, and supportive tissue. Together, xylem and phloem tissues form the vascular system of plants. Q: What type of plant is the dominant group of land plants? Choices: - grass plants - oxygen plants - thermal plants - vascular plants A:
Answer:
vascular plants