explain the charge distribution in polar molecule
Answer:
polarity results from uneven partial charge distribution between atoms in a compound
Explanation:
electrons in a polar covalant bond are unequally shared between the two bonded atoms which results in partial positive and negative charges.the separation create a dipole.
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The picture shows two containers filled with a gas, both initially at room temperature.
Which statement is correct?
The gas particles in both containers have the same average kinetic energy because they have equal number of particles.
The gas particles in both containers have the same average kinetic energy because they have the same volume.
The average kinetic energy of the gas particles is greater in container A because it has a lower temperature.
The average kinetic energy of the gas particles is greater in container B because its particles move faster.
Answer:
1) CO₂
2) 0.2551 g
Explanation:
The balanced reactions are:
CaCO₃ + 2HCl → CaCl₂ + H₂O + CO₂
MgCO₃ + 2HCl → MgCl₂ + H₂O + CO₂
1) The gas produced is CO₂.
2) Calculate mass of CaCO₃:
(0.5236 g) (0.4230) = 0.2215 g CaCO₃
Convert to moles:
(0.2215 g CaCO₃) (1 mol / 100.1 g) = 0.002213 mol CaCO₃
Find moles of CaCO₃:
(0.002213 mol CaCO₃) (1 mol CO₂ / mol CaCO₃) = 0.002213 mol CO₂
Convert to mass:
(0.002213 mol CO₂) (44.01 g / mol) = 0.09738 g CO₂
Calculate mass of MgCO₃:
(0.5236 g) (0.5770) = 0.3021 g MgCO₃
Convert to moles:
(0.3021 g MgCO₃) (1 mol / 84.31 g) = 0.003583 mol MgCO₃
Find moles of MgCO₃:
(0.003583 mol MgCO₃) (1 mol CO₂ / mol MgCO₃) = 0.003583 mol CO₂
Convert to mass:
(0.003583 mol CO₂) (44.01 g / mol) = 0.1577 g CO₂
Total mass of CO₂:
0.09738 g CO₂ + 0.1577 g CO₂ = 0.2551 g CO₂
Answer:
The average kinetic energy of the gas particles is greater in container B because its particles move faster.
Explanation:
How does the central bank Control branch
Answer:
Central banks control and manipulate the national money supply: issuing currency and setting interest rates on loans and bonds.
Explanation:
To ensure a nation's economy remains healthy, its central bank regulates the amount of money in circulation. Influencing interest rates, printing money, and setting bank reserve requirements are all tools central banks use to control the money supply.
In an experiment, a small dialysis bag is filled with a 20% salt solution. It is placed in a
beaker filled with a 40% salt solution. Assuming that water can pass through the
small pores of the dialysis bag, whereas the large salt molecules cannot, what will
happen to the size of the dialysis bag?
Answer:
The bag will get smaller
Explanation:
Osmosis can be defined as the process of diffusion or movement of water molecules across a semipermeable membrane from an area of higher concentration of water (i.e., lower concentration solution) to a lower concentration of water. For example, in cells, there are specialized pores called 'aquaporins' which are membrane proteins that form channels to transport water molecules by facilitated diffusion. In this case, the outside of the bag has a higher salt concentration than inside, thereby water molecules will move by facilitated diffusion through pores from inside to outside the bag.
When using a scientific calculator, what is the the correct order of buttons to
press to enter the number 3.5 x 1015?
O A. [EE] [1] [5] [3] [] [5]
B. [1] [5] [3] [5] [EE]
C. [3] [.] [5] [EE] [1] [5]
O D. [1] [5] [3] [] [5] [EE]
SUBMIT
what are three characteristics of life that archaea bacteria have?
Answer:
The common characteristics of Archaebacteria known to date are these:
(1) the presence of characteristic tRNAs and ribosomal RNAs.
(2) the absence of peptidoglycan cell walls, with in many cases, replacement by a largely proteinaceous coat.
(3) the occurrence of ether linked lipids built from phytanyl chains.
A student wants to know how the number of geese in a study area affects the number of parts in their songs. She
performs an experiment and records the data in a table.
Which two terms describe this type of data?
A. Qualitative
B. Theoretical
C. Empirical
D. Quantitative
Answer:
B. Theoretical
D. Quantitative
Explanation:Because she is not very sure of the answer but is aware of her solution
Ġ Surface area te volume ratio plays a vital role in À. growth rate of organisms B. exchange of materials between organisms and their environment C. the life-span of organisms D. efficiency of various systems in organisms
Answer:
Exchange of materials between organisms and their environment
Explanation:
In biological systems, there are several membrane transport systems responsible for the passage of ions like Na+ and K+.
a. True
b. False
Answer:
The correct answer is: a. True.
Explanation:
There are several membrane transport systems responsible for the passage of ions like Na+ and K+.
Cell membranes are semipermeable, which means they can regulate which molecules may and cannot flow through them. Some molecules may simply drift in and out of a cell (this is called simple diffusion), while others require specific structures to enter and exit (this type of diffusion is called facilitated diffusion), and still, others require an energy boost to pass the cell membrane (this is known as active transport).
Both simple diffusion and facilitated diffusion are types of passive transport: they happen without the energy boost that ATP gives, unlike active transport.
In passive transport, molecules follow their chemical gradients and travel through the most concentrated compartment to the less concentrated one to equal the concentrations. In active transport, on the other hand, the cell makes an effort to enter or exit ions against their chemical gradients and this is done particularly to maintain said gradients (they are required for the correct functioning of the cell).
Sodium and Potassium are two of the most important ions when it comes to maintaining these gradients: sodium is very concentrated in the outside of the cells (the extracellular compartment), while potassium is highly concentrated in the intracellular compartment. These differences in concentrations are maintained thanks to the Na+/K+ pump, a form of active transport. Apart from the Na+/K+ pump, these ions go through the membrane through passive transport as well, without requiring energy.
Which development would most reflect Karl Marx's belief in the economic
system that he predicted would replace free markets?
A. Governments eliminate all taxes on wealthy corporations.
B. Workers share all the profits generated from a factory.
C. Companies begin to sell their products in overseas markets.
D. Businesses refuse to hire workers who demand high wages.
Answer:
D. Businesses refuse to hire workers who demand high wages
Explanation:
Karl Marx's predicted that if businesses refuse to hire workers with high wages according to their value, this can lead to revolution and can destroy or replace the free markets.
which of the following is a density- independent factor?
1 mate availability
2 parasitic infestation
3 disease transmission
4 lack of rainfall
Answer:
4. Lack of Rainfall
Explanation:
What component of Earth's atmosphere exists entirely as a result of photosynthesis?
oxygen pas
n mas
O water vapor
O nitrogen gas
O carbon dioxide gas
Answer:
Explanation:
Carbon dioxide
Pls I need help with the test variable and outcome plssssssss help meee
Answer:
Lengthy answer my guy
Explanation:
You could just independently test each material's makeup process.
Or just make an example with a glass container of which includes heated air coming in through a tube from outer sources.
And the water slowly evaporating as a result?
I don't know how the teacher explained it to you boss.
WOmbats are what type of mammals?
Answer:
Los wombats son marsupiales que solo se encuentran en Australia, pero estos curiosos y simpáticos animales de piernas cortas y rechonchas rara vez son tenidos en cuenta como otros animales nativos como los koalas y los canguros, que parecen ser más mediáticos.
Explanation:
what is the phylum of lizard?
Lizard belongs to chordate phylum.
hope it helps you.
A group of archaic mammals that at times are referred to as mammal-like primates characterized by claws instead of nails, no postorbital bar, arboreal quadrupeds, and best known from Montana and lived during the geologic Paleocene Epoch are referred to as:
Nutrient Food source Role in the body Vitamin A Iron Iodine Vitamin D Protein
Answer:
There are seven main classes of nutrients that the body needs. These are carbohydrates, proteins, fats, vitamins, minerals, fibre and water. It is important that everyone consumes these seven nutrients on a daily basis to help them build their bodies and maintain their health.
these are the 7 main classes of Nutrition that the body needs hope it will help you
What is data that is not directly collected or observed by the scientist called?
Answer:
Data that is not directly collected or observed by the scientist
It means that the data that was collected by someone else that is not the scientist, it may include censuses, surveys, data bases or other sort of information.
Explanation:
How are growth and development dinstinct from each other
Answer:
Growth is a physical change in ones body size that can be easily observed.
Development is the ability to do things complex, challenging, and difficult.
The development of DNA technology is bringing profound changes to science, agriculture and healthcare. Provide one example of a DNA technology and provide at least one advantage and one example of a concern or problem associated with its use.
Answer:
The CRISPR-Cas9 genome editing system can be used to edit genes and correct mutations associated with inherited diseases. However, this technology also has the potential to edit genes in germline cells in order to irreversibly modify the human species and the natural evolution of life
Explanation:
The CRISPR-Cas9 (Clustered regularly interspaced short palindromic repeats and CRISPR-associated protein 9) system is a natural prokaryotic defense system used by bacteria to defend against invading DNA. In the laboratory, the CRISPR-Cas9 system has been repurposed to create a versatile genome-editing tool that allows us to modify the genome of mammalian cells in a targeted fashion. The CRISPR-Cas9 is a simple gene-editing tool that consists of a single guide RNA (sgRNA) that guides the Cas9 enzyme to the exact genomic location where Cas9 needs to make a cut, which is then repaired by different DNA repair mechanisms. During DNA repair, nucleotides can be replaced and/or deleted, thereby producing desired genomic modifications. The CRISPR-Cas9 has an enormous potential to repair mutations in genes associated with inherited genetic disorders and cancer (i.e., oncogenes might be reversed in vivo by using this technology). However, the CRISPR-Cas9 genome editing system is also a subject of concern due to its dual use. For example, this technology can be used to modify the genome of germline cells by inducing mutations that can be passed across generations, thereby irreversibly modifying human DNA and altering the normal course of evolution.
Which of the following words is generally used to describe what managers do as opposed to what leaders do b) Organize c) Inspire O d) Innovate
If you're running away from a bear, A) both your liver cells and my leg muscle cells will be running glycolysis. B) both your liver cells and my leg muscle cells will be running gluconeogenesis. C) your liver cells will be running gluconeogenesis and your leg muscle cells will be running glycolysis. D) your liver cells will be running glycolysis and your leg muscle cells will be running gluconeogenesis.
Answer:
C) your liver cells will be running gluconeogenesis and your leg muscle cells will be running glycolysis.
A forest was cleared and turned into a field of organic soybean plants. Which of the following most likely occurred?
A. The variety of plants and animals both increased
B. The number of insects increased
C. The number of insects decreased
D. The number of plant species increased
When a forest is cleared, biodiversity decreases. The correct answer is option C: The number of insects decreased
Biodiversity refers to different species of plants and animals in a habitat. We will all agree that the biodiversity in a forest ecosystem is much higher than the biodiversity in a field of organic soybean plants.
There are less species of organisms in the field of organic soybean plants.
Therefore, the variety of plants and animals both decrease.
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What is the first stage of metamorphosis?
Answer:
larve
Explanation:
innner metamorphasis started
Answer:
Larva Pls mark brainliest
Explanation:
If you compare the histone modifications at the imprinting center on the maternal and paternal chromosomes, you would expect to see ____________ on the maternal chromosome and ____________ on the paternal chromosome.
a. activating marks like H3K9 acetylation; silencing marks like H3K9 methylation
b. silencing marks like H3K9 methylation; activating marks like H3K9 acetylation
Answer:
b. silencing marks like H3K9 methylation; activating marks like H3K9 acetylation
Explanation:
Genomic imprinting is an epigenetic phenomenon that leads to parent-of-origin-specific monoallelic expression, thereby genes under imprinting are differentially expressed depending on their parental origin. Genomic imprinting involves DNA methylation, histone modification such as histone 3 lysine 9 methylation (H3K9) and non-coding RNA regulatory epigenetic pathways, which act together to silence one parental gene form or 'parental allele'. Maternal imprinting occurs when the maternal allele is silenced (usually caused by methylation of the maternal allele), whereas paternal imprinting occurs when the paternal allele is silenced (methylation of the paternal allele). Moreover, H3K9 acetylation is connected with active promoters (gene transcription). The imprinted genes are generally grouped in genomic regions called imprinting centers (ICs) that regulate gene expression according to the parental origin.
Our body needs both vitamin and mineral in a small quantity ,still they are important why?
Answer:
Vitamins and minerals are considered essential nutrients—because acting in concert, they perform hundreds of roles in the body. They help shore up bones, heal wounds, and bolster your immune system. They also convert food into energy, and repair cellular damage.
What is produced during the replacement reaction of Ba(NO3)2 and Na2SO4?
2BaNa + 2NO3SO4
2NaNO3 + BaSO4
NaNO3 + BaSO4
BaNa2 + (NO3)2SO4
Answer:
2NaNO3 + BaSO4
Explanation:
Answer:
2NaNO3 + BaSO4
Explanation:
Hydrocarbons are burned to produce water and carbon dioxide. Propane (C3H8) is a homologous series alkane that belongs to the hydrocarbon family. As a result, when propane is burned, three molecules of carbon dioxide and four molecules of water are produced.
Because there is an overabundance of oxygen, carbon dioxide is created when butane is completely burned.
Give reason. Mosquitoes and housefly are placed in the phylum arthropoda
Mosquitoes and Housefly are grouped under the phylum Arthropoda because they both posses jointed legs (or appendages).
Animals that have jointed appendages are called Arthropods (i.e animals with jointed legs). They are triploblastic (i.e they have 3 germ layers) and exhibit bilateral symmetry. They are both six-legged arthropods sub-grouped under the class Hexapoda (coined from the word "hexa" meaning six and "Poda" meaning leg). Their body are divided into three parts; head, thorax and abdomen.
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There are 2 types of cells in nervous tissue, what are their roles?
Step One: Anatomical Developments
Match the following anatomical developments (A-J) with the number where they occur on the Hominin Anatomy Phylogeny (below).
A. decreased prognathism, moderate sized molars, phalanges not curved (derived), Found in South Africa, still relatively small brain (-450cc)
B. canine reduction, lower jaw tooth row shape intermediate between parallel and parabolic, have footprints explicitly displaying bipedal
patterns, curved phalanges
C. further brain expansion, decrease in teeth size, decrease in brow ridges, flattening of the face, mental eminence, vertical forehead
D. megadontia complex (huge molars, jaws, and chewing muscles), slight increase in cranial capacity (410-530cc)
E. femur and pelvis indicate capable of bipedalism
F. brain expansion, megadontia reduction, smaller less projecting face, smaller jaws
G. occipital bun common, retromolar space, robust postcrania, relatively short limbs
H. further brain expansion, reduction in teeth, face, and jaws, increased brow ridges, increased body size
1. loss of honing complex, obligate bipedalism, curved phalanges (primitive), parallel tooth row shape
J. foramen magnum position indicates likely capable of bipedalism
A. Hoomo ergaster & Hoomoo erectus
B. Hoomoo erectus
C. Hoomoo ergaster
D. Hoomoo Habilis
E. Hoomoo ergaster and Hooomo erectus
F. Hoomo Habilis
G. Hoomoo erectus
H. Hoomoo ergaster
I. Hoomoo ergaster and Hoomoo erectus
J. Hoomoo erectus
Homooo erectus fossils are found in China and Indonesia. They have widest part of brain case at cranial base.
They have reduced post canine and decrease jaw size. They have shorter forelimbs and are bipeds.
Homooo habiliss are dimorphic species which have long forelimbs and shorter forelimbs.
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