The diagrams below represent some respiratory structures in three organisms. The labeled structures in these organisms all have a similar function. What is the main function of the labeled structure(s) in each organism?
A)Circulation of blood
B)Digestion of food
C)Production of food
D)Exchange of gases
Answers
Answer:
D
Explanation:
Lungs, Moist skin , Gills is in the exchange of gases system
The correct answer is D.
The structure of human lungs is first demonstrated in an organism.
Lungs are the respiratory organs. They are made up of alveoli.Main Function :The main function of lungs is the gaseous exchange. This gaseous exchange occurs in the alveoli. Oxygen from atmosphere comes into the lungs through nostrils, nasal cavities, pharynx, larynx, trachea, bronchi and finally reaches the lungs. Then gaseous exchange occurs between blood and alveoli. Oxygen enters into the blood and carbon dioxide leaves the blood.The structure of Earthworms Moist skin is second demonstrated in an organism.
The earthworm has no special respiratory organs like lungs or gills. Respiration takes place through the body wall. The outer surface of the skin is richly supplied with blood capillaries which aid in the diffusion of gases. Oxygen diffuses through the skin into the blood while carbon dioxide from the blood diffuses out. The skin is kept moist by mucous and coelomic fluid and facilitates exchange of gases.The structure of Fish Gills is third demonstrated in an organism.
The gill filaments in fish have functions like lungs in people: it's the organ responsible for absorbing oxygen and expelling carbon dioxide. The gills also regulate levels of mineral ions and the pH of the blood, as well as being the primary site of nitrogenous waste excretion, in the form of ammonia.Learn more about Respiratory System here:
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Related Questions
how many grams of ZrCl4 can be produced if 123 g of ZrSiO4 react with 85.0 g of Cl2?
Answers
Answer:
153.3 grams of ZrCl₄ are produced
Explanation:
The equation of the reaction is as follows:
ZrSiO₄ + Cl₂ ----> ZrCl₄ + SiO₂ + O₂
molar mass of ZrSiO₄ = (91 + 32 + 16 * 4) = 187.0 g/mol
molar mass of ZrCl₄ = (91 + 35.5 * 4) = 233.0 g/mol
molar mass of Cl₂ = (35.5 * 2) 71.0 g/mol
From the equation of reaction, 1 mole of ZrSiO₄ reacts with one mole of Cl₂ to produce one mole of ZrCl₄
number of moles of ZrSiO₄ present in 123 g = 123/187 = 0.65 moles
number of moles of Cl₂ present in 85.0 g = 85.0/71.0 = 1.19 moles
therefore, ZrSiO₄ is the limiting reactant
123.0 g of ZrSiO₄ will react with excess Cl₂ to produce 123 * 233/187 grams of ZrCl₄ = 153.3 grams of ZrCl₄
Therefore, 153.3 grams of ZrCl₄ are produced
A chemist weighed out 2.9 g of nickel. Calculate the number of moles of nickel she weighed out. Be sure your answer has the correct number of significant digits.
Answers
Answer:moles = 2.9 g Ni × 1 mol Ni 58.69 g Ni = 0.0663 mol Ni
True or false? Covalent molecules are formed when non-metal atoms share electrons with other non-metal atoms.
Answers
Answer:
true
covalent bonds are between non metals and nonmetals. and they are sharing electrons.
What is the molecular formula of paradichlorobenzene that has a molar mass of 147.g/mol and an empirical formula of C3CIH2?
Answers
Answer:
the molecular formula of paradichlorobenzene is C6H4CL2
What is the total number of joules required to freeze a 10 g sample of water at 0°C?
show work if possible and will give brainliest
Answers
Explanation:
the answer will be 98.4 kJ
As per concept of enthalpy of fusion , 98,397 joules of energy are required to freeze 10 g of water at 0°C.
What is enthalpy of fusion?Enthalpy of fusion is defined as the enthalpy change which results from when a substance changes its state from solid to a liquid at a constant pressure.Heat of solidification is opposite of enthalpy of fusion.During fusion there is a phase transition which takes place, from liquid to solid.
The temperature at which the fusion takes place is called as the fusion temperature. This enthalpy is accompanied without any change in temperature.
Enthalpy of fusion of water=333.55 J/g . This value is for 1 g of water as per definition,hence for 10 g water enthalpy of fusion is 10×333.55=3335.5 J.
Hence, 3335.5 joules are required for freezing 10 g sample.
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y = (x-16)2 A. Shift the graph of y = x2 down 16 units. B. Shift the graph of y= x2 right 16 units. C. Shift the graph of y = x2 left 16 units. D. Shift the graph of y = x2 up 16 units.
Answers
Answer:
Uhmm i think i dont know the sent r 6un Dury r in eyeing in d7ue
Plant cells and animal cells were observed under a microscope. The characteristics of two cells are listed below.
Cell X: Has chloroplast
Cell Y: Does not have a cell wall
Which statement about the two cells is correct? (5 points)
a
Cell X has a cell membrane.
b
Cell X has a small vacuole.
c
Cell Y has a large vacuole.
d
Cell Y has chloroplast.
Answers
Answer:
The answer is B
Explanation:
ITs B
Answer:
Cell X has a cell membrane
Explanation:
I took the test and got it right.
Help pls thnk you!!!!
Answers
The distinguishing functional group of an alcohol is the hydroxy group (—OH). Both the second and third structures have an —OH group, but the —OH in the third structure is part of a carboxyl group (—COOH or —C(=O)OH). A carboxyl group takes priority over hydroxy group. Thus, the second structure would be an alcohol and the third structure would be a carboxylic acid.
That leaves us with the fourth structure, a hydrocarbon with a halogen substitutent, or, aptly named, a halocarbon.
How do you solve -8r=240
Answers
Answer:
You solve that dividing beach term by -8 and simplifying which for this answers will give you r=-30
Explanation:
Pls correct me if I’m wrong.
Hope this helps :)
Which statement describes why the viscosity of water is lower than that of
olive oil?
A. The molecules that make up water have more kinetic energy than
the molecules that make up olive oil.
B. The molecules that make up water can more easily slide past one
another than the molecules that make up olive oil.
C. The molecules that make up water have less kinetic energy than
the molecules that make up olive oil.
D. The molecules that make up water are larger than the molecules
Answers
Answer:
Option B. The molecules that make up water can more easily slide past one another than the molecules that make up a olive oil.
The molecules that make up water can more easily slide past one another than the molecules that make up olive oil. Hence, option B is correct.
What is viscosity?Viscosity is a term used to describe FLUIDS, which includes liquids and gases. Viscosity refers to the ability of a gas or liquid to resist flow.
Olive oil has a higher viscosity than water because it is a much larger molecule than water with larger dispersion forces.
Hence, option B is correct.
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Need help with question 3!
*please answer correctly*
A student increases the temperature of a 300cm3 balloon from 40°C to 110°C.
What will the new volume of the balloon be? Round your answer to one decimal point.
(To convert Celsius to kelvin, add 273.15)
Thank you!!!
Answers
Answer:
[tex]V_2=367.06\ cm^3[/tex]
Explanation:
Charles law states that volume of the gas is directly proportional to the temperature i.e.
[tex]\dfrac{V_1}{T_1}=\dfrac{V_2}{T_2}[/tex]
We ave,
V₁ = 300 cm³
T₁ = 40°C = 40 + 273.15 = 313.15 K
T₂ = 110°C = 110 + 273.15 = 383.15 K
Let V₂ be the new volume.
[tex]V_2=\dfrac{V_1T_2}{T_1}\\\\V_2=\dfrac{300\times 383.15 }{313.15}\\\\V_2=367.06\ cm^3[/tex]
So, the new volume of the balloon is [tex]367.06\ cm^3[/tex].
element A it's valance number is 3 and element B it's valance number is 6 make it compound
Answers
Answer:
A2B
Explanation:
A = 3
B = 6
exchange valencies
A6B3
A2B
a roller coaster train with a mass of 500 kg stops at the top of a hill if the hill is 110 m high what is the potential energy of the train
Answers
Answer:
Answer is 5000
Explanation:
5000 is your answer
Answer:
what the other person says their wright
Explanation:
stay safe 2021
What mass of potassium chloride, KCl, is produced when 12.6 g of oxygen, 02, is produced?
Answers
Mass of KCl= 19.57 g
Further explanationGiven
12.6 g of Oxygen
Required
mass of KCl
Solution
Reaction
2KClO3 ⇒ 2KCl + 3O2
mol O2 :
= mass : MW
= 12.6 : 32 g/mol
= 0.39375
From the equation, mol KCl :
= 2/3 x mol O2
= 2/3 x 0.39375
=0.2625
Mass KCl :
= mol x MW
= 0.2625 x 74,5513 g/mol
= 19.57 g
Plz help I need the answer now!! Which statement is best supported by the evidence on the map?
A. Oil is produced mostly in the southern part of Africa.
B. Gold is found in every country in Africa.
O
C. Iron ore is found mostly in northern Africa.
D. Each country in Africa has about the same amount of each natural
resource.
Answers
Answer:
I'd say C. You can eliminate the rest of the answers and get C. Most of the iron is found up North on the map.
Explanation:
Use the periodic table to determine the molar mass of each of the following elements. Use the correct number of significant figures.
Potassium (K):
g/mol
Osmium (Os):
g/mol
Manganese (Mn):
g/mol
Answers
Answer:
Potassium (K): 39.10 g/mol
Osmium (Os): 190.23 g/mol
Manganese (Mn): 54.94 g/mol
Explanation:
Just got it right on Edge 2021
The molar mass of the following elements are
Potassium (K): 39.10 g/mol
Osmium (Os): 190.23 g/mol
Manganese (Mn): 54.94 g/mol
What is molar mass?The molar mass of a substance is grams of one mole of that substance.
It can be calculated by dividing the atomic weight of the element, and the number of atoms found in that element.
Manganese is a transition metal with the atomic number 25.
Potassium is an essential mineral that is an alkali metal and its atomic number is 19.
Osmium is also a transition metal whose atomic number is 76.
Thus, the molar mass of the elements are, Potassium (K): 39.10 g/mol
Osmium (Os): 190.23 g/mol
Manganese (Mn): 54.94 g/mol
Learn more about molar mass
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Chromosomes _____. (Choose all that apply)
1.) Are tightly coiled bundles of DNA
2.) Carry many genes
3.) Are found inside the nucleus of eukaryote
4.) Can be used to diagnose genetic disorders
5.) Outnumber genes in a cell
Answers
Answer:
1.) Are tightly coiled bundles of DNA
2.) Carry many genes
3.) Are found inside the nucleus of eukaryote
4.) Can be used to diagnose genetic disorders
Explanation:
A chromosome is a thread-like structure made up of DNA. The chromosomes are made of DNA which are tightly coiled around protein.
Chromosomes carry hundreds and thousands of genes. The number of genes in a cell outnumbers the number of chromosomes.
In eukaryotic cells, all the chromosomes are found inside the nucleus of eukaryote.
The chromosomes and DNA can be examined so as to diagnose genetic disorders.
2
A brick has a mass of 4.0 kg and the Earth has a mass of 6.0 x 10
Use this information to answer the questions below. Be sure your answers have the correct number of significant digits.
What is the mass of 1 mole of bricks?
?
How many moles of bricks have a mass equal to the mass
of the Earth?
Answers
Answer:mass of 1mole of brick = mass of 1 brick x avagadro number
= 4 kg x 6.022 x 10^23 bricks = 2.4 x 10^24 kg
No. of moles of bricks have a mass equal to the mass of the earth
= mass of earth / mass of 1 mole of brick
= [ 6 x 10^27 ] / [ 2.4 x 10^24 ]
= 2.5 x 10^3
= 2500 moles
Explanation:
Calculate the energy of a photon emitted when an electron in a hydrogen atom undergoes a transition from =3 to =1.
Answers
Answer:
[tex]1.936\times 10^{-18}\ \text{J}[/tex]
Explanation:
[tex]R_h[/tex] = Rydberg constant = [tex]2.178\times 10^{-18}\ \text{J}[/tex]
[tex]n_i[/tex] = Initial shell = 3
[tex]n_f[/tex] = Final shell = 1
We have the relation
[tex]\Delta E=R_h(\dfrac{1}{n_f^2}-\dfrac{1}{n_i^2})\\\Rightarrow \Delta E=2.178\times 10^{-18}(\dfrac{1}{1^2}-\dfrac{1}{3^2})\\\Rightarrow \Delta E=1.936\times 10^{-18}\ \text{J}[/tex]
The energy of the photon emitted here is [tex]1.936\times 10^{-18}\ \text{J}[/tex].
Magnesium bromide is prepared in a laboratory using the reaction below. Typically, the magnesium bromide is recoveted as a solid by heating way the remaining water
Mg(s) + 2 HB-(aq) - MgBrac) + H200)
If 0.940 mole of HBr in solution is added to 16.5 grams of Mgo in a beaker and then is heated until dry, what are the expected contents of the beaker?
Answers
Which of the following is an example of a ball of clay undergoing a physical change?
I. The ball is thrown into the air
II. The ball is broken into two separate halves
lll. The ball is rolled along the ground
lV. The ball is flattened into a pancake like shape
Answers
Answer:
II. The ball is broken into two separate halve. The ball is still a ball. It is just in a different form.
IV. This one is also correct because it is only changing the physical state of the ball. The ball is still a ball.
PV=nRT is an example that deacribes the relationship between pressuee, volume,moles and temperature of a gas. This is an example of a
Answers
Answer:
This is an example of Avogadro equation
What is the amount of diamine silver that can be formed when 10.00 g AgCl is mixed with 1.00 L of 0.100 M NH3?
Answers
The amount of diamine silver chloride = 8.87 g
Further explanationGiven
10 g AgCl
1.00 L of 0.100 M NH3
Required
the amount of diamine silver
Reaction
AgCl + 2 NH₃ → [Ag(NH₃)₂]Cl
mol AgCl :
= mass : MW
= 10 g : 143,32 g/mol
= 0.0698
mol NH₃ :
= M x V
= 0.1 x 1
= 0.1
NH₃ as a limiting reactant
mol [Ag(NH₃)₂]Cl based on NH₃ :
= 1/2 x mol NH₃
= 1/2 x 0.1
= 0.05
Mass diamine silver :
= 0.05 x 177.3822 g/mol
= 8.87 g
BRIANLIEST!!!!!!
Use the mass to calculate the number of moles in a 347.89 g samples of ammonium
Answers
Answer:
20.46 moles
Explanation:
1 mole of NH3 contains 17gm of NH3
so 347.89 gm of ammonia is in,
347.89/17 moles
=20.46 moles
NOTE. There should be ammonia instead of ammonium in question because ammonium is an ion not a compound.
A _____ is two or more substances that are together in the same place but are not chemically combined.
Answers
Answer:
Mixture
Explanation:
A mixture has two or more substances that are together in the same place but are not chemically combined .
HOPE THIS HELPS YOU;)
TRUE OR FALSE
If mechanical energy is conserved, the kinetic energy you end up with always equals the potential energy you lost.
Answers
........false.........
At room temperature , 1 mL of water has a mass of 1 gram . What is the percent by mass of a 428 mL magnesium citrate ( solution containing 0.1 mol of magnesium citrate ?
Answers
Answer:
5.0% by mass
Explanation:
Percent by mass is 100 times the ratio between the mass of solute (Magnesium citrate) in the mass of solution.
Mass of Magnesium citrate -Molar mass: 214.41g/mol-:
0.1mol * (214.41g/mol) = 21.441g
Assuming the volume of the solution is just due the solvent -Water-, the mass of water is 428g.
Percent by mass is:
21.441g / 428g * 100 =
5.0% by massIf you have 90L of water, what is the volume?
Answers
Answer:
900
Explanation:
can someone help please?
Answers
Answer:
Genetic Factors: Bad tasting leaves, plant structure, types of stems, reproduction
Environmental: insects, pollution, terrain, soil conditions, pH of soil, fire, flood, heat wave, temperature, lack of air, drought,
Explanation:
Genetic factors are within the organism, the plant's own make-up. Environmental factors are conditions on the outside, in the soil, the atmosphere, and other organisms in the habitat.
Stoichiometry :
2 AlCl3 + 3 MgSO4 --> Al2(SO4)3 + 3 MgCl2
If 633.1 g AlCl3 reacts, how many moles of MgCl2 are formed?