All of the following can increase free radical production, EXCEPT: A)Smoking B)Tanning booths and radiation. C)All of these options increase free radical production. D)Consuming pesticides and chemical additives. E)Lead and other heavy metals exposure.

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Answer 1

Answer: C) All of these options increase free radical production

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Help! answer 7 & 9 please.

Which of these features was formed by hotspot volcanism?The Grand Canyon
The Big Island of Hawaii
The Appalachian Mountains
The Himalaya Mountain Range

Answers

These feature that was formed by hotspot volcanism is The Big Island of Hawaii. The Hawaiian Islands are actually found at the tip of several volcanoes that has been formed by a series of volcanic eruptions. Today, the Big Island sits on the hotspot, and contains the only active volcanoes of the group of islands.

The Big Island of Hawaii was formed by hotspot volcanism, whereas The Grand Canyon, The Appalachian Mountains, and The Himalaya Mountain Range were not.

Ayala is making salad dressing. She mixes oil and vinegar in a blender until a smooth consistency is formed. Explain whether this is a heterogeneous or a homogeneous mixture and why.

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The correct answer would be homogeneous mixture. There are two types of mixture depending on the distribution of the components in the mixture. Homogeneous mixtures are mixtures which has uniform properties all throughout the mixture. For this case, the mixture of oil and vinegar had already achieved a uniform consistency.

Correct Answer: Mixture will be heterogeneous

Reason:
The mixture is said to be homogenous, if it contains single phase, On other hand, heterogenous system has, multiple phases. When, oil and vinegar are mixed together, on standing, the two liquids separates out as different phases. Hence, the mixture will be refereed as heterogeneous.

What are small subunits or building blocks of a large molecule called?A. Macromolecules
B. Monomer
C. Polymer
D. Organic

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Answer:

Explanation:

How many protons are in chromium-58?

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24 same as atomic mass

What region of the atom contains most of the atoms mass?

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Answer:

Nucleus

Explanation: it is the center of the atom, and contains protons and nuetrons

Describe the difference between chronic and acute exposure.

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"Radiation exposure might be short-term or long-lasting. First, think of a medical x-ray exposure where the time of exposure is short—the machine is on and off within a very short period of time. Or think about radioactive materials that naturally occur in our soils; they present us with small amounts of radiation exposure that occur over our lifetime. Depending on the source, time of an exposure can vary—in some cases, the time will be very short, seconds or less, and in other cases it will be occurring continuously over our lifetime. Keep in mind that being exposed to radiation in a short period of time or over a long period of time is no indication of the total radiation dose and, thus, the possible health effects that may occur."

Answer: chronic is long term and severe while acute lasts for a short amount of time.

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When 2 mol of Fe(s) reacts with Cl2(g) to form FeCl3(s) according to this equation, 799 kJ of energy is evolved. Calculate ΔrHo. A) -399.5 kJ mol^-1 B) -199.75 kJ mol^-1 C) 399.5 kJ mol^-1 D) 199.75 kJ mol^-1