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Dmitrij [34]
4 years ago
5

Students in a science class learn that groundwater is an important source of drinking water for many communities. They construct

a model to study how leaking chemicals from a landfill can affect groundwater.
What is the most effective way for the students to see how leaking chemicals from a landfill can enter a well?


A.Tilt the tank towards the well and drain some of the water out of the tank.

B.Drop food color into the well at the well's opening.

C.Tear some of the colored tissue paper and put the paper pieces into the well at the well's opening.

D.Pump water out of the well to see how stained water from the tissue paper moves toward the well.
Chemistry
1 answer:
sveticcg [70]4 years ago
5 0

Groundwater is also one of our most important sources of water for irrigation from septic tanks and toxic chemicals from underground storage tanks and leaky landfills ... Drinking contaminated groundwater can have serious health effects. If there is a leak, these contaminants can eventually make their way down

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Why is it preferable to allow cold water to enter at the bottom of a condenser and exit at the top?
harkovskaia [24]
In a distillation model, it is better to let the cold water enter the bottom of the condenser and exit at the top because this can lead to a better cooling effect.
When water enters from the bottom, they will stay longer in the condenser, thus the vapor in the condenser can be cooled back into liquid faster.
In addition, this method can also save the amount of water used, since they water can stay longer in the condenser.
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4 years ago
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The gas sample has a volume of 69.0 μL at 24.2 °C . What is the volume of the gas after the sample is cooled to 8.3 °C at consta
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6 0
3 years ago
Which element would have properties characteristic of both a metal and a nonmetal
PolarNik [594]

Answer:

Examples: Si, B, Ge, Sb, Ga

Explanation:

The majority of elements in the periodic table are classified as either a metal (a species that can lose electrons to become a cation) or a non-metal (a species that can gain electrons to become an anion).

However, there are several atoms which are considered to be metalloids. Metalloids are elements which possess properties that resemble both metals and non-metals. Examples of metalloids would be: silicon (Si), boron (B), germanium (Ge), antimony (Sb), gallium (Ga).

Since metalloids have properties of both metals and non-metals, they are widely used in semiconductors, as they might both donate and accept electrons in their shells.

7 0
4 years ago
Who developed the first fabricated obturator? A. Paré B. Vesalius C. The Romans D. Fauchard
balandron [24]

I believe the correct answer is option A. Paré.

Or otherwise known as Ambroise Paré. He was considered one of the "fathers of surgery" for modern forensic pathology. And was known to be a pioneer in surgical techniques on the battlefield using medicine, mostly in the treatment/healing of wounds.

Hope I could help! :)

3 0
4 years ago
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