What safety procedural step must always be performed when setting up a vacuum filtration apparatus?

Answers

Answer 1

The safety procedural step that must always be performed when setting up a vacuum filtration apparatus is that first, you should always wear the proper protective equipment, next is that the vacuum filtration—you should clamp the flask of which is needed, securely to the ring stand. It must be secure or it may be in the way of performing the experiment.


Related Questions

Which two structures of plants and fungi perform similar functions?

1.leaves and fruiting body

2.stem and hyphae

3.root and mycelium

4.stem and fruiting body

Answers

pretty sure its roots and mycelium

Answer: 3. root and mycelium

Plants are autotrophic organisms, which means they utilizes sunlight, atmospheric carbon and water, to prepare their own food in the form of carbohydrates. But these plants also requires some minerals like phosphorus, magnesium, nitrogen which are needed for their proper growth and metabolism. These plants obtain these minerals by absorbing them from the soil by the roots. Fungi are saprophytic organisms, which means they derive their food by decaying and decomposing the dead plants and animal traces. These fungi have thread like structures called as hyphae. The hyphae is responsible for penetrating the dead matter and obtaining nourishment. It functions like that of roots in plants. The aggregate of hyphae is called as a mycelium .

Therefore, both root and mycelium has a function in absorption of nourishment in the plants and fungi respectively.

By how much did carbon dioxide levels increase from 1980 too 2000

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20? I think lol sorry if I am not much of a help




Explain three benefits that humans gain from "hosting" the microbial community of the human gut

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1. Normal flora in the human gut can help digestion of certain product. One of the examples would be stercobilin from bilirubin cycle.
2. The microbial community can decrease infection chance because it will cause the pathogen that enters intestine to grow slower.
3. The microbes also can provide some nutrition like vitamins B and vitamin K. 

Most shells of marine organisms are composed of:

Answers

They are mostly made of Calcium Carbonate

Is the following true or false? An atom that loses electrons has a negative charge.

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I believe False is the answer

The statement "an atom that loses electrons has a negative charge" is absolutely false.

What are the characteristics of an atom?

The characteristics of an atom are as follows:

Almost all of the atoms are solid in nature.They construct by inorganic processes.They significantly possess a specific chemical composition. They are natural, not artificial substances.

An atom that tens to lose electrons has a positive charge while an atom that has the ability to accept electrons has a negative charge. For example, sodium has 11 electrons.

These electrons are filled in orbitals in scenarios 2, 8, and 1. This one electron is present in the outermost valence shell and wants to lose this in order to obtain stability. So, sodium loses this electron and becomes Na+.

Therefore, the statement "an atom that loses electrons has a negative charge" is absolutely false.

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Which types of foods contain which types of macromolecules? Is one type of macromolecule healthier to eat than another? Why do you think so?

Answers

Sugar is carbohydrates, fats are lipids, amino acids are proteins, and nucleotides are nucleic acid. They're all about the same healthiness because everyone needs all four for their diet. Carbohydrates give us energy, lipids provide energy, protein builds our structure, and nucleic acid stores our genetic information.

Do you think ex-felons should be allowed to vote? If so, under what circumstances? If not, why not?

Answers

Yes everyone deserves a second chance

Answer:

Should ex-felons be allowed to vote? I honestly do not see a problem with ex-felons voting. I feel like we are taking away a basic right/amendment from our citizens if we do not allow them to vote. Especially if they have already been released from prison I cannot find much reason to not allow them to vote. I think that they should be allowed to vote only if they were released from prison. I mean I don’t really understand why they cannot vote, but in conclusion I think they should be able to vote.

:p hope this helps

Explanation:

Drinking non-potable water does not carry significant health risks. T or F

Answers

potable water is fresh water that you drink every day (hopefully).  It's been filtered and cleaned.

non-potable includes rainwater and recycled water which is not cleaned.

so the answer is false
Yeah... This is most definetly false.

Potable water isnwater thatbhas been treated so that microbiales that can cause diseases such as Dysentery or Cholera are not present. It is a clean and safe water to drink.

Nonpoteable water is just the opposite. It is not safe to drink because can contain any number of potentially fatal diseases.

A client, diagnosed with acute pancreatitis 5 days ago, is experiencing respiratory distress. which finding should the nurse report to the health care provider (hcp)?

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The nurse should report the arterial oxygen level if it is below 50. Respiratory distress may be secondary to the initial diagnosis of acute pancreatitis and could indicate Adult Respiratory Distress Syndrome. The symptoms of ARDS may be confusion, agitation, hypoxemia, respiratory distress, crackling heard in the lungs, fever, tachypnea, dyspnea, and/or a dry cough.

What is marine biology?

Answers

Marine biology is the study of organisms that live in water, their behaviors and interactions with the environment.
Marine biology is the study of marine organisms, their behaviors and interactions with the environment.

Someone who follows a vegan diet is most likely to have a deficiency of which nutrient?

Answers

There's tons of them but protein is the most common:

Vitamin B12
Iron
Calcium
Protein
Omega 3 fatty acids
Iodine
Zinc

There can be more but these are the most common ones.

Thank you! Someone finally understands that you don't need meat to get protein(P.S.S I am vegan and I'm only 12)! There are many proteins in plants that are waaaaay healthier like: beans, avacadoes, chickpeas, chai seeds, etc...

An atom of neon has 8 valence electrons. What will an atom of iodine MOST likely do to be stable?
A.gain 1 electron
B.lose 1 electron
C.lose 7 electrons
D.neither gain nor lose any electrons

Answers

An atom of neon has 8 valence electrons. What will an atom of iodine most likely D. Neither gain nor lose any valance electrons

Final answer:

An iodine atom with seven valence electrons will most likely gain one electron to become an iodide ion (I-) and achieve a stable octet configuration. So the correct option is A.

Explanation:

An atom of iodine has seven valence electrons, which means it needs to either gain or lose electrons to achieve a full octet and become stable. According to the octet rule, atoms are more stable when they have eight electrons in their outer shell. Taking into consideration that it is energetically more feasible for an atom to gain or lose a small number of electrons to achieve a full octet, an iodine atom, with seven valence electrons, will most likely gain 1 electron to complete its outermost shell. This results in an iodide ion with a negative one charge, written as I-.

A lab is performed to study the effect of pH and heat on the function of the catalase enzyme found in carrot plants. What would be considered the independent variable(s) in this lab. Select all that apply. pH temperature enzyme activity water

Answers

Both pH and Heat effect catalase function therefore we will measure the function based upon changing these variables.  

Answer: pH and temperature

Explanation:

In an experimental setup, an independent variable is the one which can be manipulated in an experiment the affect of such change can be observed on the dependent variable. The dependent variable is the outcome of the experimental procedure.

According to the given situation, the effect of enzyme over the carrot plants is the dependent variable and this effect can be observed due to pH and heat which can be changed or manipulated in an experiment to observe the desire effect of enzyme over the carrot plants. Hence, these two variables are independent variables.

Typically, how many amino acids make up a protein chain?

Answers

I think its 20, we briefly covered this in class

The client is 24 weeks pregnant. how much have her daily calorie needs increased over her first trimester needs?

Answers

About 300 calories over her first trimester.

What type of bond is responsible for holding two water molecules together creating the properties of water?

Answers

hydrogen bond holds water molecules together 

Compare the biodiversity in an oligotrophic lake with a eutrophic lake

Answers

Oligotrophic and eutrophic lakes can be described in terms of productivity, in which an oligotrophic lake, tanks to its low nutrient level and generally inhospitable environment for life, is said to be less productive while the more life-sustaining eutrophic lake type is said to be more productive. In general, lakes can progress from being oligotrophic when they are first formed to being eutrophic as they mature and gain the qualities of a life-sustaining ecosystem. For example, a lake that forms in a land depression caused by a receding glacier may start out with very little life and nutrients, but microorganisms that are able to gain a foothold there begin digesting and composting organic material, making for a more fertile nutrient base that beings to sustain more plant life.
Final answer:

Oligotrophic lakes have low nutrient levels and lower biodiversity, with clear water and fewer plankton. Eutrophic lakes have high nutrient levels leading to algal blooms, which can cause oxygen depletion and disrupt aquatic life. While eutrophic lakes may have diverse ecosystems initially, their long-term health can be compromised by excessive nutrient input.

Explanation:

Comparing the biodiversity in an oligotrophic lake with a eutrophic lake involves examining the differences in their ecosystems due to nutrient levels. An oligotrophic lake has low nutrient concentrations, resulting in clearer water with fewer phytoplankton. The low levels of nutrients such as nitrogen and phosphorus mean that these lakes often have less overall biological productivity and hence lower biodiversity. In contrast, eutrophic lakes are characterized by high levels of nutrients, often attributed to runoff containing fertilizers or sewage. This leads to a rapid growth of algae and phytoplankton, known as algal blooms, which may eventually result in oxygen depletion as dead algae decomposes. Consequently, eutrophic lakes often have higher initial biodiversity, but the excessive growth and subsequent oxygen depletion can lead to dead zones, significantly harming aquatic life.

For example, eutrophication in Dianchi Lake, China, caused by fertilizer pollution, led to fish kills due to oxygen depletion. This illustrates the negative impact of nutrient overload on lake ecosystems. Another impact is that deep zones in eutrophic lakes may become aphotic and unable to support photosynthetic plant life. However, in the open-water and littoral zones of lakes, sunlight promotes plant growth and supports various organisms such as fish, snails, and insects.

A good way for someone to identify similar substances is to measure their densities. true or false?

Answers

The answer is True: Any substance can be known by measuring it's density and comparing that density with other substances we already know, so we can give an idea of which group of elements that substance belongs to. It is good to remember that Density (D) is obtained by dividing the mass (M) between volume (V).
For example, when encountering an unknown substance, we can know it's volume by inserting the object into a graduated cylinder, with a known amount of water, and measuring the new volume with the substance in the water; Thus, the mass is divided between the volume, and having then obtained the results, we look for the density of known elements and at the end we can know to which group of elements belongs.

What do fats, steroids, and waxes have in common? what do fats, steroids, and waxes have in common? (a) moderate polarity. (b) low solubility in water. (c) they occur in membranes. both (a) and (c). both (b) and (c)?

Answers

Fats, steroids, and waxes have low solubility in water, which is what they have in common. Therefore, the correct option is B.

The hydrophobic or non-polar properties of these three types of molecules prevent them from mixing well with water. Triglycerides, which are a type of fat made from glycerol and fatty acids, are important for energy storage. The unique structure of steroids, which include hormones such as testosterone and estrogen and hormones such as cholesterol, is made up of four fused carbon rings. Long-chain fatty acids linked to long-chain alcohols or other hydrocarbon molecules form waxes, which are prized for their ability to repel water.

Therefore, the correct option is B.

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Fats, steroids, and waxes all are hydrophobic and have low solubility in water, which is their common feature uniting them.

Fats, steroids, and waxes all share a common feature: they are hydrophobic and insoluble in water. This lack of water solubility is crucial for their function in biological systems. Steroids, characterized by their four linked carbon ring structure, do not closely resemble other lipids in structure but are grouped with them due to their shared hydrophobicity. Waxes also share this characteristic, often utilized by plants as a protective layer on leaves. Both steroids and waxes, along with fats, play varied but important roles in living organisms.

Although some steroids are found within membranes, such as cholesterol, and fats (as part of phospholipids) are key components of cellular membranes, waxes are not typically associated with membrane structure. Therefore, when considering the options provided, the low solubility in water is the commonality that unites fats, steroids, and waxes.
Thus, the correct answer to the question is option (b) low solubility in water.

What bodily structures look like to the naked eye is called _ anatomy?

Answers

The bodily structure looks like naked to the eye is called gross anatomy. Gross Anatomy is the study of large body structures visible to the naked eye. Such as the heart, lungs, and kidneys.

According to Merriam dictionary, gross anatomy is a branch of anatomy that deals with the macroscopic structure of tissues and organs

What structural differences suggest that eukaryotic cells evolved from prokaryotic cells?

Answers

The endosymbiotic theory suggests that several bacteria were ingested by a larger host bacteria, and formed a symbiotic relationship with one another, forming Eukaryotes.

If carbon dioxide and water were abundantly available to a heterotrophic prokaryotic cell, would it be possible for the cell to use them as a food source?

Answers

If carbon dioxide and water were abundantly available, a heterotrophic prokaryotic cell would not be able to use them as a source of food. 
This is because, heterotrophic prokaryotic cells can only use carbon from organic compounds as food; they can not fix raw carbon.

Answer:

No, it would be impossible

Explanation:

Heterotrophs are so called because they cannot synthesize their own food, they depend on an external source. The synthesis of food is unique to a particular set of organisms called AUTOTROPHS. They have the ability to capture the energy from sunlight using pigments called CHLOROPHYLL and use this energy to synthesize their food in their Chloroplast. This process is called PHOTOSYNTHESIS. Autotophs combine CO2 and H2O (water) to produce glucose (organic molecule).

Heterotrophs like animals, do not possess this ability to capture sunlight energy or fix carbon to produce their food. Hence, in an abundance of CO2 and water, their cells would be unable to utilize these molecules, as only the Chloroplast of autotophs can undergo this process.

In your own words, describe how a thunderstorm develops. Be sure to include the three stages of thunderstorm development in your response.

Answers

 Its produced by a cumulonimbus cloud. three stages are the cumulus stage, mature stage, and dissipating stage

Answer:

The development of thunderstorms takes place in three stages:  

a) Cumulus stage: In this stage, warm and moist air elevates and condenses to produce a cumulus cloud at approximately 4.7 miles high.  

b) Mature stage: The cloud develops more to turn into a cumulonimbus cloud at a height of 7.6 miles. At this stage, falling of raindrops, ice crystals, and in certain stages falling of hail also takes place. The lightning and thunder are common.  

c) Final stage: The falling precipitation leads to a strong downdraft, and the dying out of the storm takes place as the supply of the water vapor gets used up.  

Where in your spirogyra cell does photosynthesis, which creates the biological molecule used for fuel, occur?

Answers

Photosynthesis, which creates the biological molecule used for fuel occurs in the chloroplast of spirogyra cell. The chloroplast of Spirogyra is a long, spirally coiled ribbon shaped with Pyrenoids. Pyrenoids are protein containing structures, which store starch around them and arranged in a single series in the mid axial line of chloroplast.

The chorus in l’orfeo functions doubly, as both______ and _____.

Answers

Shepherds and the infernal spirits act as both the narrators to push along the flow of the story being told but also the comic relief needed to reduce the suspense of the conflict between Orpheus and the gods of the Underworld.

What is the name of the part of the peripheral nervous system that controls voluntary movement of skeletal muscles?

Answers

striated muscles ruhhhhh

What are the two basic nose styles for lineman's side cutting pliers?

Answers

Final answer:

The two basic nose styles for lineman's side cutting pliers are bypass pruners, which work like scissors for cleaner cuts, and anvil cut, where a blade cuts against a flat plate. Comfort and ease of use are important factors when choosing the right pruners, and ratchet pruners may be useful for those with a weaker grip.

Explanation:

The two basic nose styles for lineman's side cutting pliers are the bypass pruners and the anvil cut style. The bypass pruners style features two blades that operate like scissors where a thin, sharp blade slides closely past a thicker blade. This type typically provides cleaner, closer cuts. On the other hand, the anvil cut style involves a sharpened blade that cuts against a flat plate, which is good for cutting through tough materials but may not leave as clean a cut as the bypass style.

When selecting pruning tools, it's important to consider the comfort of the pruners in your hand. Test for a comfortable grip and appropriate size, and if you have difficulty using them, look into specialized tools like ratchet pruners, which require less pressure to operate.

What percentage of infertility cases are due to a cause involving only the male partner?

Answers

the answer to this question is 20 percent.
In general, women has more roles during the fertility process, so their margin of error will be significantly higher compared to the male counterparts.
The male's role during fertility process is to insert the sperm, while the women have to face potential mistakes in their uterus, their nutrition, their eggs condition, their hormones, external accidents, etca

In sexually reproducing animals, once fertilization of the egg takes place, the ___________ exists as a single cell until cell division begins.
A) egg
B) larva
C) sperm
D) zygote

Answers

In sexually reproducing animals, once fertilization of the egg takes place, the ___________ exists as a single cell until cell division begins.


D) zygote

d the awner is d, because its larva


Which biome is home to more plant and animal species than any other?

Answers

The tropical Eastern Pacific biome is home to more plants and animal species than any other, as it is home to the Amazon rainforest.
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which phrase from the passage most clearly shows an imperialistic attitude? Excerpt from: Momotaro, or "Little Peachling"Japanese FolktaleA long long time ago there lived an old man and an old woman. One day the old man went to the mountains to cut grass; and the old woman went to the river to wash clothes. While she was washing, a great big thing came tumbling and splashing down the stream. When the old woman saw it she was very glad, and pulled it to her with a piece of bamboo that lay near by.When she took it up and looked at it she saw that it was a very large peach. She then quickly finished her washing and returned home intending to give the peach to her old man to eat. What can be inferred about the old woman?A)She is easily annoyed.B)She is eager to do something nice for her husband.C)She enjoys doing her chores.D)She dislikes doing her chores. 4k-(2k-6) simplify the expression If a current vendor does not meet dole's needs, dole will likely initiate _____. Thomas hobbes believed that human life before society, "in a state of nature," was The reaction between elemental phosphorus p4(s) and o2(g) to make p4o10(s): The sum of two numbers is 55 and the difference is 1 . What are the numbers? What has been the reason for popular resistance to civil rights laws for the disabled? At the end of the first day, 7 weeds appear in your neighborhood park. each day, the number of weeds increases by four times. how many weeds will be in the park at the end of 14 days? Arguments consist of __________, which are statements that are either true or false.logic false premises sounds propositions The general adaptation syndrome progresses through these three stages (in order): How many solutions does this equation have 3(x+11) = 6(x+ 33) When asking data owners questions to determine how sensitive or critical their data is, you should ask what type of question to get unbiased answers? The word hydrolysis has two roots, hydro and lysis. describe how this term relates to the chemical reaction illustrated in model 2 When conducting research with human participants, criminologists must develop a system of mutual trust and obligations between the researcher and subject? What features and policies of the Inca government helped the emperor control his empire? 2,783 and 7,283 what value of 2 Some elephants in the scrub jungles of Africa had long trunks with which to reach out for leaves. They were able to reproduce more successfully than elephants with short trunks. Which aspect of Darwin's theory is this scenario an example of? Which of the following elements is the most reactive? Chlorine Bromine Fluorine Helium What did John Lock believe?A. Government should not interfere in the economy.B. Only those born into royalty should be allowed to have political power. C. Government should protect the natural right of life, liberty, and property.D. The best way to protect liberty was to separate a government's powers into the legislative, executive, and judicial branches. Steam Workshop Downloader