Answer:
This question is incomplete as it does not include the table. However, the functions of the systems on the table with their associated systems are;
- Releases hormones: Digestive and endocrine systems
- Supplies the body with oxygen: respiratory and circulatory systems
- Supplies the body with nutrients: digestive and circulatory systems
- Removes carbon dioxide: respiratory and circulatory systems
Explanation:
Endocrine system of the body constitutes endocrine glands that secrete hormones into the bloodstream. Example of endocrine glands are the adrenal gland, pituitary gland, hypothalamus, thyroid, ovaries etc. However, the PANCREAS, which is an organ in the digestive system is also an endocrine gland that secretes INSULIN and GLUCAGON hormones into the bloodstream. Hence, the endocrine and digestive systems releases hormones
The respiratory system comprises organs that regulate gas exchange in the body i.e. take in oxygen, take out carbon dioxide. However, the circulatory system, which comprises the arteries, veins, capillaries transports the oxygen throughout the body via the blood. The oxygen enters via the respiratory system and is circulated by the circulatory system.
Ingested food is broken down via the digestive system, which comprises of organs like small intestine, stomach, pancreas, large intestine, liver etc. The digested food releases nutrients into the bloodstream, which gets transported by the blood to other parts of the body. Hence, the circulatory and digestive systems play a part in supplying the body with nutrients.
Respiratory system via the process of gas exchange removes carbon dioxide from the body system. However, the carbon dioxide waste enters into the bloodstream (circulatory system) initially before getting transported to the lungs where the respiratory system takes over by exhalation
Answer:
I think it is the third option.
Explanation:
what are lower and higher energy levels.
Answer:
If an atom, ion, or molecule is at the lowest possible energy level, it and its electrons are said to be in the ground state. If it is at a higher energy level, it is said to be excited, or any electrons that have higher energy than the ground state are excited
Explanation:
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zinc is often used to calibrate calorimeters because it undergoes a very sharp phase transition from the solid to the liquid at 419.5oc. calculate the enthalpy change when 5 g of zinc metal is heated from 100oc to the point where the entire sample is melted. (the heat of fusion for zinc is 112.4 j/g and its specific heat capacity is 0.388 j/goc.)
The enthalpy change when 5 g of zinc metal is heated from 100°C to the point where the entire sample is melted is 1185.46 J.
The enthalpy change when 5 g of zinc metal is heated from 100°C to the point where the entire sample is melted can be calculated using the following formula:
ΔH = (5 g) x (0.388 J/g°C) x (419.5°C - 100°C) + (5 g) x (112.4 J/g)
ΔH = 5 g x 0.388 J/g°C x 319.5°C + 5 g x 112.4 J/g
ΔH = 623.46 J + 562 J
ΔH = 1185.46 J
Therefore, the enthalpy changes when 5 g of zinc metal is heated from 100°C to the point where the entire sample is melted is 1185.46 J.
The overall heat content of a system is represented by the thermodynamic quantity known as enthalpy. It is an energy-like property or state function that has dimensions similar to energy and is therefore measured in units of joules or ergs.
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what is kind of property is denisty?
Answer:
INTENSIVE PROPERTY OF MATTER
Explanation:
DENSITY IS AN INTENSIVE PROPERTY OF MATTER THAT ILLUSTRATES HOW MUCH MASS A SUBSTANCE HAS IN A GIVEN AMOUNT OF VALUE,
Where in Recycle City where you can get information on what to do with leftover cleaning products. Why is it important that we not throw chemicals into the regular trash
In Recycle City, you can get information on what to do with leftover cleaning products at the Household Hazardous Waste Facility.
It is important that we not throw chemicals into the regular trash because they can be harmful to the environment and human health. Chemicals can leach into the soil and groundwater, contaminating water sources and harming wildlife. They can also release toxic gases when burned in incinerators or landfills.
By properly disposing of leftover cleaning products, we can prevent these harmful effects and protect the environment. The Household Hazardous Waste Facility is designed to handle these types of materials and can safely dispose of or recycle them. It is important to follow proper disposal guidelines to ensure the safety of ourselves and our community.
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Which of the following pairs lists a substance that can neutralize HNO3 and the salt that would be produced from the reaction?
O BaOH2 and Ba(NO3)3
O KOH and K2NO3
O NH3 and NH4NO3
O NH4 and NHA(NO3)2
Answer:
NH3 and NH4NO3
Explanation:
I took the test and guessed this since I couldn't find it here, it turned out to be correct so I thought I'd share.
The substances that can react with HNO3 to neutralize it are NH3 and NH4NO3.
What is neutralization?The term neutralization has to do with the reaction between an acid and a base to yiled salt and water only.
The substances that can react with HNO3 must be basic substances hence the substances required are NH3 and NH4NO3.
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The cultures of prehistoric humans are known mostly through the excavation of stone tools and other relatively imperishable artifacts. The early tool making traditions are often referred to as being paleolithic (literally "Old Stone Age). The Oldowan and Acheulian tool traditions of the first humans were the simplest applied research basic research Scientihe thought O philosophies technologies
The cultures of prehistoric humans are primarily known through the excavation of stone tools and other durable artifacts, such as the Oldowan and Acheulian tool traditions.
Stone tools and imperishable artifacts serve as key archaeological evidence for understanding prehistoric cultures. Through meticulous excavation and analysis, archaeologists have been able to piece together the lifestyles, technological advancements, and social behaviors of early human societies. The term "paleolithic" refers to the Old Stone Age, a time when humans relied on stone tools as their primary implements.
The Oldowan tool tradition is considered the earliest stone tool industry, dating back around 2.6 million years ago. It is characterized by simple tools, such as choppers and scrapers, which were crafted by flaking off pieces from larger stones. These tools were primarily used for basic activities like butchering and processing animal carcasses.
Later, the Acheulian tool tradition emerged around 1.76 million years ago, representing an advancement in stone tool technology. Acheulian tools, such as handaxes and cleavers, were more refined and standardized, showcasing an increased level of sophistication in tool-making techniques. These tools served a wide range of purposes, including hunting, woodworking, and shaping raw materials.
By studying the Oldowan and Acheulian tool traditions, researchers gain valuable insights into the cognitive abilities, cultural development, and technological progress of early humans. The examination of these artifacts provides evidence of their adaptability, problem-solving skills, and the gradual refinement of their tool-making techniques over time.
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A 765 mL mixture of argon, krypton, and xenon gases has a total pressure of 912 torr at a temperature of 291 K. If the partial pressure of argon is 251 torr, and the partial pressure of krypton is 126 torr, what mass of xenon (in grams) is present in the mixture
To determine the mass of xenon in the mixture, we can use the ideal gas law and the partial pressures of the gases. The ideal gas law equation is:
PV = nRT
Where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature.
First, we need to find the number of moles of xenon in the mixture. We can use the partial pressure of xenon and the total pressure:
P(xenon) = P(total) - P(argon) - P(krypton)
P(xenon) = 912 torr - 251 torr - 126 torr = 535 torr
Now, we can rearrange the ideal gas law equation to solve for the number of moles:
n(xenon) = (P(xenon) * V) / (R * T)
n(xenon) = (535 torr * 0.765 L) / (62.36 L·torr/mol·K * 291 K)
n(xenon) ≈ 0.0145 mol
Finally, we can calculate the mass of xenon using its molar mass:
Mass(xenon) = n(xenon) * Molar mass(xenon)
Mass(xenon) ≈ 0.0145 mol * 131.29 g/mol ≈ 1.90 g
Therefore, the mass of xenon present in the mixture is approximately 1.90 grams.
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The breaking down or wearing away of rock and soil is known as... A. earthquake
B. global shift C. weathering D. deposition
Answer:
the breaking down of rock is known as weathering
Determine the shape and appropriate bond angles for a compound that has a central sulfur atom with two unshared pairs of electrons and single bonds to two hydrogen atoms
According to the molecular geometry, the shape of of compound with central sulfur atom with two unshared pairs of electrons and single bonds to two hydrogen atoms is V-shaped and bond angle is 92.1 °.
What is molecular geometry?Molecular geometry can be defined as a three -dimensional arrangement of atoms which constitute the molecule.It includes parameters like bond length,bond angle and torsional angles.
It influences many properties of molecules like reactivity,polarity color,magnetism .The molecular geometry can be determined by various spectroscopic methods and diffraction methods , some of which are infrared,microwave and Raman spectroscopy.
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NaCIO3 compound name
Answer:
Sodium chlorate
Explanation:
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The structure shown is an example of what kind of polymer? Question 10 options: A) Polyamine B) Polyester C) Polyalkane D) Nylon
Answer:
Examples of natural condensation polymers include cellulose, starch, and polypeptide chains of proteins. Several synthetic condensation polymers discussed include nylon, kevlar, polyester, Bakelite, Melamine, polycarbonates, polyurethanes, epoxies
Explanation:
Ten plants are grown in equal amounts of sunlight with equal amounts of water and varying amounts of fertilizer.
Fertilizer is a(n):
How much heat must be transferred to 55 g of ice to change the ice's
temperature from -13°C to -5.0°C? (The specific heat capacity of ice is 2.11
J/g.°C)
What substances will dissolve in water?
nonpolar
polar
Answer:
polar
Explanation:
¿Cuántos moles de bióxido de Nitrógeno (NO 2) se forman cuando reaccionan 5 moles de Nitrógeno (N 2)?
Answer:
10 moles de NO2
Explanation:
Tenemos la ecuación de la reacción como sigue;
N2 (g) + 2 O2 (g) → 2 NO2 (g)
Asi que;
Si 1 mol de nitrógeno produce 2 moles de NO2
5 moles de nitrógeno producirán 5 * 2/1 = 10
Por tanto, se producen 10 moles de NO2 moles
A
region that has a specific
climate and a specific
community of plants and
animals
Answer: A biome is part of the biosphere. Biomes can influence each other. terrestrial biomes
Explanation:
mass density and volume of molasses
Answer:
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Explanation:
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Which one of these sentences is appropriate for a formal lab report in CHM113 lab? O Three more trials were conducted and the data was recorded. O First, record the seven concentrations of the red dye which...... O The corvet was whipped with a soft tissue and then........ The error occurred because Tim spilled the solution. o We got a good yield.
O Three more trials were conducted and the data was recorded.
In chemistry, attention is the abundance of a constituent divided by the entire extent of a combination. several kinds of mathematical descriptions can be outstanding: mass awareness, molar awareness, range attention, and volume concentration.
The awareness of the solution tells you the way much solute has been dissolved within the solvent. as an example, in case you upload one teaspoon to 2 cups of water, the attention may be mentioned as 1 t salt per 2 c water. The vinegar label will file that the solution is 5% via weight acetic acid.
The concentration of a Solute. There are basic ways of reporting the concentration of a solute in a solvent, via reporting the mass of the solute in a given volume, or the variety of moles of solute in a given quantity.
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Which element has atoms with an average atomic mass of 2.180 x 10^-22 g? Place your answer in the box. Do not spell out the name of the element. Express your answer using only the proper elemental symbol
The element with an average atomic mass of 2.180 x \(10^{-22}\) g is Boron (B).
How to find the atomic mass of an element?The element with atoms having an average atomic mass of 2.180 x \(10^{-22}\) g is Boron. To determine this, follow these steps:
1. Convert the given atomic mass to atomic mass units (amu) by dividing by the conversion factor 1.66054 x \(10^{-24}\) g/amu:
(2.180 x \(10^{-22}\) g) / (1.66054 x \(10^{-24}\) g/amu) ≈ 13.11 amu
2. Compare the calculated atomic mass to the periodic table to find the element with a close atomic mass. In this case, Boron (B) has an atomic mass of approximately 10.81 amu.
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Be as explicit as you can in describing how the covalent bond between an atom of Chlorine and an atom of Iodine forms. (What happens to the electrons, which electrons are involved, and what allows this to happen MUST all be part of your answer to receive full credit.)
When two atoms of chlorine and iodine join together to form a covalent bond, their outermost electrons interact to form a chemical bond.
What is a Covalent bond?
A covalent bond is a type of chemical bond that involves the sharing of a pair of electrons between two atoms. Covalent bonds are formed when two atoms come together to share their electrons in order to reach a more stable electron configuration. As a result, the two atoms become bonded together by the attraction of their shared electrons.
The chlorine atom has seven valence electrons, while the iodine atom has seven as well. Both atoms will want to complete their octets, so the two atoms share their outermost electrons with each other. During the formation of the covalent bond, the chlorine atom will donate one of its electrons to the iodine atom, while the iodine atom will donate one of its electrons to the chlorine atom. This sharing of electrons allows the two atoms to form a single bond and fill their octets, forming a covalent bond.
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What are the three types of reduction?.
Three Types of Reductions are Removal of oxygen, addition of hydrogen and gain of electrons.
Reduction involves the transfer of electrons from one species to another. It can be considered as the removal of oxygen, the addition of hydrogen, or the gain of electrons.
Removal of oxygen:
Metal ores which are oxides are reduced to the metal - this is how iron is made from iron ore. The reducing agent is carbon monoxide.
Addition of hydrogen:
Aldehydes and ketones can be reduced to primary or secondary alcohols respectively using aqueous sodium borohydride. This is a source of H− ions which bring about the reduction.
Gain of electrons:
The formation of non-metal ions from the corresponding element, for example during electrolysis.
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Fill in the blanks to balance the following chemical equation.
__P +__02 - P406
Answer:
4P + 3O2 → P4O6
Explanation:
Chemical Equation Balancer Online!
The balanced chemical equation can be represented for the given reaction as:
\(4\;P + 3\;O_2\longrightarrow P_4O_6\)
What is a balanced chemical equation?A chemical equation for a chemical reaction can be represented in terms of chemical symbols of the reactants and products. A balanced chemical equation in which the number of atoms of reactants and products is equal on either side of the equation.
The law of conservation of mass gives the idea that the total mass of both the reactant side and the product side is equal in a balanced chemical equation.
The given chemical equation has the given reaction:
\(4\;P + 3\;O_2\longrightarrow P_4O_6\)
The number of phosphorous and oxygen atoms are equal on both sides of the arrow therefore it is a balanced chemical equation. Therefore, the mass of the phosphorus and oxygen elements will be equal on the reactant as well as product side.
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chm2211l lab 1 grignard reaction and air oxidation
Contrarily, air oxidation refers to a substance's interaction with atmospheric oxygen. Alcohols or ketones are only two examples of the oxidation products that might occur as a result of this event. To show the characteristics and reactivity of Grignard reagents as well as the effects
Organometallic substances known as Grignard reagents are often utilised in the synthesis of organic molecules. They are created by mixing magnesium metal with an organic halide in an anhydrous, dry solvent like ether. Grignard reagents may be used to create complex organic compounds, add functional groups to organic molecules, and generate new carbon-carbon bonds. They are very reactive and flexible. Grignard reagents must be handled carefully and stored in sealed containers due to their reactivity to avoid oxidation by air. One of the most significant and often utilised reactions in organic synthesis involves Grignard reagents and carbonyl compounds.
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The car has a rechargeable battery to drive it’s motor. The rechargeable battery provided a potential difference of 330 volts and can store up to 64 mega Jules it takes 8 hours for the battery to receive a full charge assume that the charging process is 100% efficient calculate the total charge the flows while the battery is being charged
The total charge that flows while the battery is being charged is approximately 193,939.39 Coulombs.
To calculate the total charge that flows while the battery is being charged, we can use the relationship between electrical energy, potential difference, and charge.
The electrical energy (E) stored in the battery is given as 64 mega Jules (64 MJ). The potential difference (V) provided by the battery is 330 volts. We know that the energy (E) is equal to the product of the potential difference (V) and the charge (Q):
E = V * Q
Since the charging process is 100% efficient, all the electrical energy supplied is stored in the battery. Therefore, we can rearrange the equation to solve for the charge (Q):
Q = E / V
Substituting the given values, we have:
Q = 64 MJ / 330 V
To perform the calculation, we need to convert mega Jules (MJ) to joules (J) since the SI unit of energy is joules. One mega Joule is equal to 1 million joules:
Q = (64 * 10^6 J) / 330 V
Calculating the division:
Q ≈ 193,939.39 Coulombs
Therefore, the total charge that flows while the battery is being charged is approximately 193,939.39 Coulombs.
This value represents the quantity of electric charge transferred during the charging process, and it indicates the amount of electricity that enters the battery.
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Think critically which of Mendel principles would apply to mating organisms that have two different alleles for three different traits.
A nearly complete skeleton, ____ is a classic example of a Neanderthal with many defining Neanderthal characteristics. Group of answer choices Taung Child La Ferrassie 1 Piltdown Man KNM-ER 1805
Answer: La Ferrassie 1
Explanation: La Ferrassie 1, often referred to as LF1, is a male Neanderthal skeleton estimated to be 70–50,000 years old. It was discovered at the La Ferrassie site in France by Louis Capitan and Denis Peyrony in 1909. The skull is the most complete Neanderthal skull ever found.
How many atoms are in 3.05 moles of CH4?
There are 18.3 x 10^23 atoms in 3.05 moles of CH4. Methane (CH4) is a hydrocarbon and the simplest and most common member of the alkane family of organic compounds.
Moles are a unit of measurement used in chemistry to express the amount of a substance. The Avogadro constant, which is the number of atoms or molecules per mole, is 6.022 x 10^23.
To find the number of atoms in a given number of moles, you can use the formula:
n = N x N_A
where n is the number of atoms, N is the number of moles, and N_A is the Avogadro constant.
In the case of CH4, it is composed of 1 carbon atom and 4 hydrogen atoms per molecule.
So, to find the number of atoms in 3.05 moles of CH4, you can plug in the values into the formula:
n = 3.05 x 6.022 x 10^23
n = 18.3 x 10^23 atoms
Therefore, there are 18.3 x 10^23 atoms in 3.05 moles of CH4.
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An old refrigerator is rated at 500 W how many kilowatt hours of electric energy what does refrigerator use in 30 days assume the refrigerator is running 12 hours per day
The refrigerator would use 180 kilowatt-hours (kWh) of electric energy over the course of 30 days, assuming it runs for 12 hours each day.
To calculate the kilowatt-hours (kWh) of electric energy used by the refrigerator in 30 days, we need to multiply the power rating by the total running time.
Given:
Power rating of the refrigerator = 500 W
Running time per day = 12 hours
Number of days = 30
First, we need to convert the power rating from watts to kilowatts:
Power rating = 500 W / 1000 = 0.5 kW
Next, we calculate the total energy used in kilowatt-hours (kWh) over the 30-day period:
Energy used = Power rating × Running time × Number of days
Energy used = 0.5 kW × 12 hours/day × 30 days
Energy used = 180 kWh
Therefore, the refrigerator would use 180 kilowatt-hours (kWh) of electric energy over the course of 30 days, assuming it runs for 12 hours each day.
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how many kilograms are 129.569grams?
0.129569. You have to divide the mass value by 1000.
A gas in a container has a pressure of 0.77 atm, volume of 65,5 L and a temperature of 235 K. If the gas
is helium, what mass of helium is in the container?
A) 2.61 g
B) 10.5 g
C) 0.625 g
D) 0.859 g
Answer:
B) 10.5
Explanation:
PV= NRT -> N=PV/RT
N= mols . P= pressure . V= volume in Liters T= temp in Kelvin (Celsius degree = 273.15) . R= Gas constant (.0821 for atm)
N=(.77 x 65.5)/(.0821x235) = 2.614 mols of Helium
Mols x Molecular weight = weight in grams
2.614x4.003(Molecular weight ot He) = 10.46 round to 10.5