help I don't get it what does this mean

Given,

The mass of phosphorus is 8.2 g,

The mass of hydrogen is 4 g,

The molar mass of P₄ is 123.6 g/mol

The molar mass of H₂ is 2.016 g/mol

The molar mass of PH₃ is 33.924 g/mol

The balanced chemical reaction is:

P₄ (s) + 6H₂ (g) → 4PH₃ (g)

First, there is a need to calculate the moles of P₄ and H₂,

Moles of P₄ = mass of P₄/molar mass of P₄ = 8.2 g / 123.6 g/mol

= 0.066 moles

Moles of H₂ = mass of H₂/molar mass of H₂ = 4 g / 2.016 g/mol

= 1.98 moles

From the reaction it is concluded that:

1 mol of P₄ reacts with 6 moles of H₂

0.066 moles of P₄ reacts with 6 × 0.066 = 0.396 moles of H₂.

This signifies that H₂ is in excess amount and P₄ is in limited amount.

Now, there is a need to calculate the moles of PH₃:

As, 1 mole of P₄ reacts to give 4 moles of PH₃

So, 0.066 moles of P₄ reacts to give 4 × 0.066 = 0.264 moles of PH₃.

Now, there is a need to calculate the mass of PH₃

Mass of PH₃ = moles of PH₃ × molar mass of PH₃

Mass of PH₃ = 0.264 moles × 33.924 g/mol = 8.955 g

Therefore, the maximum number of grams of PH₃ formed is 8.955 g.

It makes the ocean a little colder and as the glacier melts it adds more water to the ocean.

hope this helps? :)

Ans.

Biological interactions or ecological interactions are defined as relationships that affect two organisms of same or different species living in a community. Different types of association are observed in different organisms.

Barnacles and whale show a type of symbiotic relationship, in which barnacles get benefit from association, without causing any harm to whale. This type of association is known as commensalism. Thus, option A). correctly matches with option 3). commensalism.

A stork and fish shows prey-predator relationship, where stork is predator that feeds on small fishes (preys). In this kind of relationship one species gets benefits, while other gets harm. Thus, option B). correctly matches with option 1). prey-predator.

A tick sucking the blood from an animal body shows a kind of symbiotic association, known as parasitism. The tick (parasite) lives inside inside or on the body of another organism (host) to get benefit and causes harm to the host. Thus, option C). correctly matches with option 2). parasitism.

A - Mitochondria

B - Nucleus

C - Golgi Body or Apparatus

The structures that are labelled in the diagram below are as follows:

A = mitochondria

B = Nucleus

C= glogi apparatus

A cell can be defined as the structural and functional unit of the body which is made up of the following components:

Learn more about cell here:

https://brainly.com/question/30763801

#SPJ3

Answer:

Option (a).

Explanation:

Mitochondria are double-membrane bound, present in almost every eukaryotic cells. They provide site for the cellular respiration that produces ATP as energy molecules, and hence, are known as power house of the cell.

Inner membrane of mitochondria have many finger-like projections or folds, known as cristae that leads to an increase in surface area of inner membrane.

As ATP synthesis takes place on inner membrane of mitochondria, increased folding provides more surface area or space for ATP production.  

Thus, the correct answer is option (a).

Answer:

A

Explanation:

A is the answer:)

Answer:

it is answer A. Layer A is the crust and Layer B is the mantle.

Explanation:

i took the FLVS test

Plant nutrition differs from human nutrition in the way that plants do photosynthesis and produce their food by themselves but on the other hand a human cannot make their food by themselves. They use plants and animals for their food. Plants make their nutrients by combining carbon dioxide (CO2) and water (H2O) to form organic matter glucose (food). While human nourishment is produced or developed by the active output of them from which they produce food.

Mitochondria, or the "powerhouse of the cell" produces energy by breaking nutrients and creating a series of biochemical reactions in a process called cellular respiration. The mitochondria essentially makes ATP, a rich energy currency...

Answer is D

The mitochondria in cells functions to produce energy, specifically adenosine triphosphate (ATP), via a process called cellular respiration. Thus, mitochondria are often called the 'powerhouse' of the cell.

The function of mitochondria in cells is to produce energy. This crucial organelle, often referred to as the powerhouse of the cell, is responsible for generating adenosine triphosphate (ATP) - the primary energy currency used in cellular processes. The mitochondria achieves this through a process known as cellular respiration, where it breaks down glucose and other organic molecules to produce ATP. This is fundamentally significant for the correct functioning and survival of cells in all multi-cellular organisms including humans. So, the correct answer to your question is 'D: Producing energy'.

https://brainly.com/question/33318078

#SPJ3

Crossing over is the process by which genetic material is exchanged by non-sister chromatids during meiosis.

Crossing over results in a new combination of genetic information for the cell for a specific trait.

Crossing over ensures that organisms are not identical from generation to generation.

Genetic recombination allows for a variation in genetic material that is passed through the generations

The Answer is B - A cell's genotype is determined by its DNA, and it's phenotype is determined by its proteins.

Hope this helps!  

The correct answer is option B.The correct statement is that a cell's phenotype is determined by its proteins, which are encoded by the genes within the DNA, forming the cell's genotype. The genotype consists of the collection of genes, while the phenotype is the expression of these genes as proteins under specific environmental conditions.

The true statement from the given options is: A cell's genotype is determined by its DNA, and it's phenotype is determined by its proteins. This is because the genotype refers to the full collection of genes that a cell contains, which are sections of DNA that encode for proteins. However, the phenotype of a cell is the result of the observable characteristics and traits which are produced by the expression of these genes into proteins acting within specific environmental conditions.

DNA is the carrier of genetic information and it specifies the sequence of messenger RNA (mRNA), which in turn, guides the amino acid sequence of proteins following the central dogma of molecular biology. It is the sequence and expression of these proteins that give rise to the phenotype, which can vary according to which genes are expressed at a particular time and the cell's environment.

The answer is; a loss in biodiversity due to the replanting of the same modified crops each year

Monoculture has a drastic effect on biodiversity. Monoculture reduces the genetic diversity in a region and hence the environment is unable to maintain itself. This makes the environment less adaptable to environmental changes since natural selection acts on genetic diversity. Biodiversity is also important for living communities because it provides critical ecosystem services and resources critical for life, such as nutrient cycling.

I believe the answer is A

Answer:

bedrock

Explanation:

Bedrock is a substance that is a land resource used in construction. The correct option is B.

In geology, bedrock is solid rock which lurks beneath loose material in the Earth's or another terrestrial planet's crust.

Bedrock is the solid rock that underlies the freer surface material. An outcrop is a section of bedrock that has been exposed.

Regolith refers to the various types of broken and weathered rock material that may overlie the bedrock, such as soil and subsoil.

The hard, solid rock beneath surface materials such as soil and gravel is referred to as bedrock. On the ocean floor, bedrock also lies beneath sand and other sediments. Bedrock is a land resource that is used in construction.

Thus, the correct option is B.

For more details regarding bedrock, visit:

https://brainly.com/question/867715

#SPJ5

Answer:Ion

Explanation:

A charged atom that has lost or gained electrons is called an ion. Atoms that lose electrons become positively charged ions (cations), while atoms that gain electrons become negatively charged ions (anions).

A charged atom that has lost or gained electrons is called an ion. When an atom has an unequal number of positively charged protons and negatively charged electrons, it results in an electrically charged atom, or an ion. This can occur when atoms gain or lose electrons.

Atoms that lose electrons form positively charged ions, known as cations. For instance, a sodium atom that loses one electron becomes a cation with a 1+ charge. Conversely, atoms that gain electrons form negatively charged ions, referred to as anions. For example, an oxygen atom gaining two electrons becomes an anion with a 2- charge.

https://brainly.com/question/1488567

#SPJ6

The answer to your question would be: Freezes; less.

Answer:

evaporates; less

Explanation:

Evaporation of liquid refers to its transformation into gaseous state. The liquid evaporates when it is heated. Heat provides kinetic energy to the particles of the liquid. The particles are free to move far from each other due to the increased level of kinetic energy. This makes the particles of a liquid less organized when it is converted into a gaseous form.

B)Green eyes is a phenotype

Answer:

The Answer is A!

Explanation:

Hope this helps~

Answer:

A) Domain Bacteria; Kingdom Eubacteria

Explanation:

Answer:

Referring to the attached figure, there are two alleles V and v for height. The reason for using capital and small letters is to indicate the dominant or recessive nature of the allele.

Explanation:

Dominant (V):

An allele that is dominant means only one copy of that allele is enough for the expression of trait. For example, if V is for tall height, an individual with genotype Vv or VV both will have tall height because they have the allele of tall height that is dominant in nature.

Recessie(v):

An allele that is recessive nature means two copies of that allele are mandatory  for the expression of trait. For example, if v is for short height, an individual with genotype vv will have short height because they have two copies of same alleles that are recessive in nature. However if the genotype is Vv, still the individual will have tall height because capital letter is masking the effect of small letter (v allele). This is because of recessive nature of allele.

Hope it help!

In genetics, the first letter of the dominant trait is used to denote genes, with uppercase and lowercase letters used to represent dominant and recessive alleles, respectively. This makes it easier to predict inheritance patterns across generations. For instance, in the case of a pea plant, we would denote the genotype of a homozygous dominant plant with violet flowers as VV, a heterozygote as Vv, and a homozygous recessive plant as vv.

In genetics, we follow several conventions to designate genes and their alleles. To illustrate, we use the first letter of the corresponding dominant trait to denote a gene. For example, if violet is the dominant color trait for a pea plant's flower, the gene's shorthand would be a V.

When it comes to allelic representation, we use uppercase and lowercase letters to differentiate dominant and recessive alleles, with uppercase denoting the dominant allele and lowercase indicating the recessive one. As a result, we'd denote the genotype of a homozygous dominant pea plant with violet flowers as VV, a heterozygote with violet flowers as Vv, and a homozygous recessive plant with white flowers as vv.

This convention makes it more manageable and efficient to depict and predict inheritance patterns of different traits across generations. For instance, by simply looking at the capitalized or lowercase letters, one can quickly discern whether a given plant is homozygous or heterozygous for a specific trait and whether it displays the dominant or recessive phenotype.

https://brainly.com/question/38324368

#SPJ11

The protect against pathogens and help in blood clotting: White blood cells

the fluid part of blood: Plasma

cell fragments in blood that help in blood clotting: Platelets

carry oxygen throughout the body on the protein called hemoglobin: Red blood cells.

Blood is a vital bodily fluid with several key components that perform essential functions to maintain our health.

These components include plasma, red blood cells, white blood cells, and platelets, each with a unique role in the circulatory system.

White blood cells, also known as leukocytes, are the warriors of the immune system.

They protect the body against pathogens, such as bacteria, viruses, and other foreign invaders.

In addition to their immune defense functions, certain white blood cells play a crucial role in blood clotting, preventing excessive bleeding in the event of an injury.

Plasma is the fluid part of blood, making up about 55% of its volume.

It is a pale, yellowish liquid that serves as a transport medium for blood cells, nutrients, hormones, and waste products.

Plasma is primarily composed of water, electrolytes, and proteins, including albumin, globulins, and fibrinogen.

Red blood cells, or erythrocytes, are responsible for the transport of oxygen throughout the body.

They contain hemoglobin, a protein that binds to oxygen in the lungs and releases it in the body's tissues.

This oxygen-carrying capacity allows red blood cells to play a crucial role in delivering oxygen to cells and organs.

Platelets, or thrombocytes, are not whole cells but rather cell fragments.

They are instrumental in blood clotting, a vital process to prevent excessive bleeding when blood vessels are damaged.

Platelets stick together to form a plug at the site of injury, initiating the clotting process.

For such a more question on pathogens

https://brainly.com/question/1008643

#SPJ12

1. Organisims that make their own food are called autotrophs. 2.Organisims that rely on a food source are called heterotrophs. 3. Plant cells and some alge contain chloroplasts to conduct photosythesis.4. Autotrophs get their energy from the sun to convert it into chemical energy. 5. The food making process is called photosynthesis. 6. Water and carbon dioxide are the raw materials for photosynthesis.

Where are the statements? When you insert them ill be able to help you :D

The arctic, while it does support a lot of life, it is impossible for most life to live there.

Answer:

the thyroid gland is a butterfly shaped organ at the base of your neck that controls growth, hormones, metabolism, and development.

P waves move faster through the upper mantle than the crust primarily because mantle rock is denser and more tightly compressed, and is usually more solid compared to the crust.

P waves, or primary waves, are the fastest seismic waves and can move through solid, liquid, and gaseous materials. They travel faster through the upper mantle than the crust due to a few key reasons. First, the mantle rock is generally denser and stronger than the crustal rock, which allows seismic waves to travel more swiftly. This is because seismic-wave velocities are related to how tightly compressed a rock is, and this compression increases with depth.

Another factor is the state of the rock phase. Seismic waves are slowed if there is any degree of melting in the rock, and since the upper mantle is typically more solid than the crust, which may contain more variations in composition and temperature, P waves can move through it more quickly. Furthermore, changes like the mineralogical transition at a depth of 660 km cause velocities to increase dramatically, indicating how different conditions in the mantle affect wave speeds.

Answer : The structure labelled F is a central vacuole. It performs the following functions in a plant cell -

1. It accumulates the waste product generated by plant cell.

2. It maintains the shape and turgidity of a plant cell.

Since, the animal cells lack a cell wall the turgid pressure maintained by the central vacuole would cause the animal cell to burst. Thus, the animal cells lack a central vacuole as they do not need to maintain a high turgid pressure provided by the vacuole.

Explanation:

Hello.

The answer is: 78.04454 grams

Have a nice day