Q: When electrons are shared between two atoms, they make a bond called a what? Read this paragraph and choose the correct option from the provided answers: Ionic bonding typically occurs when it is easy for one atom to lose one or more electrons and another atom to gain one or more electrons. However, some atoms won't give up or gain electrons easily. Yet they still participate in compound formation. How? There is another mechanism for obtaining a complete valence shell: sharing electrons. When electrons are shared between two atoms, they make a bond called a covalent bond. Let us illustrate a covalent bond by using H atoms, with the understanding that H atoms need only two electrons to fill the 1s subshell. Each H atom starts with a single electron in its valence shell:. Choices: - metallic bond - ionic bond - hydrogen bond - covalent bond A:
covalent bond

Q: Boyle discovered that what property of a gas is inversely proportional to its volume? Read this paragraph and choose the correct option from the provided answers: in a one-liter container (Figure 22.15). In this case, the force exerted by the movement of the gas molecules against the walls of the two-liter container is lower than the force exerted by the gas molecules in the one-liter container. Therefore, the pressure is lower in the two-liter container and higher in the one-liter container. At a constant temperature, changing the volume occupied by the gas changes the pressure, as does changing the number of gas molecules. Boyle's law describes the relationship between volume and pressure in a gas at a constant temperature. Boyle discovered that the pressure of a gas is inversely proportional to its volume: If volume increases, pressure decreases. Likewise, if volume decreases, pressure increases. Pressure and volume are inversely related (P = k/V). Therefore, the pressure in the one-liter container (one-half the volume of the two-liter container) would be twice the pressure in the two-liter container. Boyle's law is expressed by the following formula:. Choices: - temperature - amount - mass - pressure A:
pressure

Q: Q: Covalent solutes separate into what when dissolved? Read this paragraph and choose the correct option from the provided answers: Ionic solutes separate into individual ions when they dissolve. Covalent solutes separate into individual molecules. Choices: - second molecules - new molecules - true molecules - individual molecules A:
A: individual molecules

Question: Q: What do you call the horizontal stems of a strawberry plant that run over the ground surface? Read this paragraph and choose the correct option from the provided answers: Strawberry plants have horizontal stems called stolons that run over the ground surface. If they take root, they form new plants. Choices: - root volunteers - climbing vines - sprouts - stolons A:
Answer: stolons

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Q: "direct" and "alternating" are two kinds of what, which is associated with electricity? Read this paragraph and choose the correct option from the provided answers: 20.5 Alternating Current versus Direct Current Alternating Current Most of the examples dealt with so far, and particularly those utilizing batteries, have constant voltage sources. Once the current is established, it is thus also a constant. Direct current (DC) is the flow of electric charge in only one direction. It is the steady state of a constant-voltage circuit. Most well-known applications, however, use a time-varying voltage source. Alternating current (AC) is the flow of electric charge that periodically reverses direction. If the source varies periodically, particularly sinusoidally, the circuit is known as an alternating current circuit. Examples include the commercial and residential power that. Choices: - time - constant - levels - current A:
**Answer**
current

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Q: What paired human organs play a vital role in maintaining homeostasis? Read this paragraph and choose the correct option from the provided answers: The kidneys ( Figure below ) are important organs in maintaining homeostasis , the ability of the body to maintain a stable internal environment despite a changing environment. Kidneys perform a number of homeostatic functions. Choices: - lungs - ears - eyes - kidneys A:
(Answer)
kidneys