CHEMISTRY HIGH SCHOOL

Which is greater the area of a red plate diner has a radius of 6 cm or the area of two yellow plate with a radius of 3 cm each

Answers

Answer 1

Answer:

Answer: Red Plate Dinner

Explanation:

If we calculate them with formula for area of circle( $\pi$ $r^(2)$ ).

Red Plate - $\pi$ $6^(2)$ = 36 $\pi$

2 Yellow Plate - 2 * $\pi$ $3^(2)$ = 2 * 9 $\pi$ = 18 $\pi$

The Red Plate has a bigger area, so the Red plate has more area.

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What phrase describes a good scientific question?has a wide focus
addresses a gap in knowledge
does not lead to a testable hypothesis
O has a simple yes or no answer
vious Activity

Answers

address a gap in knowledge

The liquid part of a homogeneous mixture is the _____.a. solvent
b. solution
c. solute
d. colloid

Answers

The liquid part of a homogeneous mixture is most often than not the a. solvent

This depends on the type of homogeneous mixture at hand. For a liquid-solid homogeneous mixture, the liquid works as the solvent. For a gas-liquid homogeneous mixture, the liquid often works as the solvent as well. However, for a liquid-liquid homogeneous mixture, the liquid acts as both the solute and solvent.

It is best to say that marine debris _______.

Answers

Answer: all of the above

Marine debris are among the biggest threats in the oceans nowadays. These include materials that are intentionally or unintentionally left in the ocean or any marine environment. Marine debris may include cigarette butts, food wrappers, bottle caps, straws, grocery bags and others.

It is best to say that marine debris is harmful to the environment. Marine debris' detrimental impacts on marine ecosystems, wildlife, and even human health have made it a major global concern.

Any human-made garbage that finds its way into oceans, seas, or other bodies of water is referred to as marine debris, also known as marine litter. It includes a variety of substances, such as rubber, paper, glass, metal, and plastic. The purpose of this note is to clarify the origins, effects, and potential remedies of this urgent problem.

Damage to Marine Life: Marine species are seriously at risk from marine garbage. Injuries, asphyxia, and even death can result when animals like sea turtles, seagulls, whales, and dolphins get tangled in garbage or mistake it for food. Damage to Ecosystems: Sensitive habitats including coral reefs, seagrass beds, and mangroves can suffer damage from marine trash. It interferes with their natural processes, has an impact on biodiversity, and changes nutrient cycles.

To know more about marine debris, here:

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Which biogeochemical cycle has the least activity because the essential element is mostly stored in rock?

Answers

The biogeochemical cycle that has the least activity because its essential element is mostly stored in rock is the phosphorus cycle. Phosphorus, unlike the other essential elements, is commonly found as a solid. This is why the atmosphere does not play a role in this cycle. Instead, phosphorus remains on land, and is mostly found in rocks and minerals.

Answer:

Phosphorus

Explanation:

What are transferred in an oxidation-reduction reaction

Answers

hydrogen atoms or electrons

Answer:

C. Electrons

Explanation:

The density of lead is 11.4 g/cm3 at 20°C. A chemist has a metallic sample that is either pure lead or mostly lead. If the density of the sample is 11.0 g/cm3 at 20°C, then the sample most likely is _____. A. pure lead
b. lead mixed with heavier substances
c. lead mixed with lighter substances

Answers

Answer:

The correct answer is option c.

Explanation:

Density is defined as mass present in unit volume of the substance.

$Density=(Mass)/(Volume)$

Given that density of pure lead is more than that of the sample.

Density of lead = $11.4 g/cm^3$

Density of sample = $11.0 g/cm^3$

Since, we know that density is directly linked to mass of the substance. So with decrease in density of substance indicates that mass present in unit volume of the substance has also decreased.

The reason behind the less density of sample from lead was that, that it was made up lead and other light substance.

The sample is most likely lead with lighter substances in it. Pure lead would be closer to the pure lead density, and heavier substances would make the density more, not less.

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