How are white blood cells linked to the lymphatic system?
Answer:
The lymphatic system produces white blood cells, known as lymphocytes. There are two types of lymphocyte, T cells and B cells. They both travel through the lymphatic system. As they reach the lymph nodes, they are filtered and become activated by contact with viruses, bacteria, foreign particles, and so on in the lymph fluid.
Explanation:
2LiBr Pb(NO3)
2 → PbBr2 2LiNO3
What do the quantum numbers of electrons represent?
A. The total number of protons and electrons in the atom
B. The number of valence electrons the atom has
O C. The oxidation states most common to the atom
D. The energy levels and orbitals the electrons are in
Answer:
the energy levels and orbitals the electrons are in
Explanation:
i just took the test :)
The energy levels and orbitals the electrons are in. Hence, option D is correct.
What are atoms?An atom contains a central nucleus surrounded by one or more electrons.
The quantum numbers of electrons represent the probable distance of the electron from the nucleus. It refers to the size of the orbital and the energy level an electron is placed in.
Hence, option D is correct.
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How is enthalpy related to the spontaneity of a reaction?
A. AH=0 contributes to spontaneity.
B. AH<0 contributes to spontaneity.
C. AH> 0 contributes to spontaneity.
D. AH does not affect spontaneity.
Answer:
D
Explanation:
Gibb's free energy change(∆G) and Standard electrode potential of electrochemical (Ecell) determine the spontaneity of a reaction.
when ∆G > 0, the reaction is not spontaneous
∆G < 0, the reaction is spontaneous
∆G = 0, the reaction is in equilibrium
when Ecell > 0, the redox reaction is spontaneous
Ecell < 0, the redox reaction is not spontaneous
Ecell = 0, the redox reaction is in equilibrium.
ΔH < 0 contributes to spontaneity.
What is a spontaneous reaction?A spontaneous reaction is one that takes place naturally under a certain set of circumstances. The general entropy, or chaos, of the system increases in the presence of spontaneous reactions.How can we determine if a reaction is spontaneous or not?We can determine it by calculating Gibb's free energy.
How do we calculate Gibb's free energy?It is calculated by the formula:
ΔG = ΔH - TΔS
ΔG is the change in Gibb's free energy,ΔH is the change in the enthalpyΔS is the change in entropy.How does ΔG tells if a reaction is spontaneous or not?If ∆G > 0, the reaction is not a spontaneous reaction∆G < 0, the reaction is a spontaneous reaction∆G = 0, the reaction is in equilibriumHow does ΔH contribute to the spontaneity of the reaction?For a reaction to be a spontaneous reaction, ∆G < 0.Consider a reaction, ΔG will be calculated as ΔH - TΔSIf ∆H < 0 then the ΔH - TΔS will be a lesser value ( more negative) than it would have been when ∆H = 0 or ∆H > 0.Therefore ∆H < 0 contributes to spontaneity.To learn more about ΔH, spontaneous reaction, enthalpy, and entropy here,
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A solution of 12M HCl is diluted so that it goes from 550mL to a total volume of 1000mL. What is the new concentration of the solution?
Answer:
6.6M
Explanation:
C=concentration
V=Volume
C1V1=C2V2
rearrange formula to find C2
(C1V1)/V2= C2
(12M x 550mL)/1000mL= C2
6600M*mL*/1000*mL* =C2 (cancel units)
6.6M=C2
Which of the following is an indicator that a chemical reaction occurred?
A precipitate is formed
The state of matter changed
It was melted
The identity of the substance did not change
Answer:
the state of matter changed
Explanation:
Answer:
A) A precipitate is formed
Explanation:
occurs in aqueous solution when two ions bond together to form an insoluble salt, which is known as the precipitate.
What does dalton mean
Answer:
Meaning:from the valley town; the settlement in the valley. Sounding like the proper English surname it was derived from, Dalton is all about being smart and trendy with equal parts cool and nerdy. Dalton, which comes from “dael” or “valley,” and “tun,” or “settlement,” may have peaked in the 1990s, but that's okay.
Explanation:
a unit used in expressing the molecular weight of proteins, equivalent to atomic mass unit.
Answer:
A unit used in expressing the molecular weight of proteins, equivalent to atomic mass unit.
Or in simpler terms a unit of measure.
Explanation:
Hope this helps and have a great say!!!!
What experimental evidence led Rutherford to conclude the following: (a) The nucleus of the atom contains most of the atomic mass. The nucleus of the atom contains most of the mass since only a collision with a very dense, massive object would cause an alpha particle to be the source. (b) The nucleus of the atom is positively charged. The positive alpha particles their initial flight indicating that the nucleus of the atom is also positively charged. (c) The atom consists of mostly empty space. Most alpha particles pass through the gold foil leading to the conclusion that the atom is mostly empty space.
Answer:
See Explanation
Explanation:
The experiment of Ernest Rutherford involved the bombardment of a thin gold foil with alpha particles from a radioactive source. A zinc sulphide screen was used to follow the movement of the alpha particles.
It was discovered that most of the alpha particles followed a straight path through the gold foil. Some of them were scattered through large angles and few were even scattered in the backward direction.
Since alpha particles were heavier than electrons, they must have been deflected by very strong forces.
These experimental evidences led to the conclusions stated in the question.
What do you predict might happen if groundwater sources around the world continue to be depleted faster than they are restored?
I'll mark brainliest!
Think about a wooden chair and a balloon. What do these two objects always have in common?
Both are made of atoms.
Both have the same physical properties.
Both are made of the same kind of atom.
Both are made of the same number of atoms.
Answer:
both are made of atoms. .
Answer:
Both are made of atoms.
Explanation:
please help me with these questions, im not understanding :(
Answer:
this is all the answers i hope you have a good day
Explanation:
may i please have a branlliests
How many molecules are there in 24 grams of HSO₃?
What is the process of old crust sinking back into a mantle?
List two kinds of text structure
Answer:
Chronological: discussing things in order.
Cause and effect: explaining a cause and its results.
List the elements and the amounts of each element below for 5 Li2S04.
Answer:
Lithium has 5 elements, sulphur has 2 elements and oxygen has 4 elements
8. Extinction of a species could result from
*
1
evolution of a type of behavior that produces greater reproductive success
synthesis of a hormone that controls cellular communication
limited genetic variability in the species
fewer unfavorable mutations in the species
Answer:
Limited Genetic Variability
Explanation:
its 3
2.0 L of a gas is at STP. What is the new pressure in kPa if the volume changes to 10.5 L and the temperature and # of molecules remain constant?
Answer:
What is the new volume if the temperature is constant? V=2.50L. P = lookPa. P2=40k Pa. V2 = x. PV = P2 ... If a sample of gas occupies 6.8 L at 327°C
A new organism is discovered. It is multicellular, heterotrophic, and does move on its own. To which two kingdoms could the organism belong?
Answer:It is a plant
Explanation:
A new organism is discovered. It is multicellular, heterotrophic, and does move on its own. The organism belong to Kingdom Animalia.
What do you mean by heterotrophs ?A heterotroph is an organism that obtains energy and nutrients from other plants or animals. The term is derived from the Greek words hetero, which means "other," and trophe, which means "nourishment."
Fungi are multicellular, heterotrophic eukaryotes with chitinous cell walls. Kingdom Plantae contains autotrophic organisms with cellulosic cell walls, whereas Kingdom Animalia contains heterotrophic organisms without cell walls.
Animalia is a kingdom of multicellular, heterotrophic organisms. This kingdom includes humans and other primates, as well as insects, fish, reptiles, and a variety of other animals.
Thus, The organism belongs to Kingdom Animalia.
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Which substance cannot be separated or broken down into simpler substances by chemical means?
table salt
gold wire
candle wax
water vapor
Answer: Gold Wire
Explanation:
Out of all of these options only gold wire is an element, elements are pure and cannot be broken down by any chemical means
hope it helped, good luck :)
How does the way in which the solar system formed explain the orbits, sizes, and compositions of the planets?
Answer:
DUE TO GRAVITATIONAL COLLAPSE SOLAR SYSTEM IS FORMED , ORBITS ARE CURVED TRAJECTORIES AND SIZE AND COMPOSTION OF PLANET ARE VERY UNIQUE AND COMPOSED OF ROCKS AND METALS and evolution of solar system has began 4.5 billion years ago,due to gravitational collapse of a small particle from a giant cloud.
Select which of the following is a major disadvantage of using nuclear power to generate electricity.
The power plants are inexpensive to build
A small amount of power is produced
No greenhouse gases are produced
The by-product of nuclear power is radiation
Answer:
The power plants
are inexpensive to build
When a 0.3546 g of vanadium metal is heated in air, it reacts with oxygen to achieve a
final mass of 0.6330 g. Calculate the empirical formula of this vanadium oxide
Answer:
V2O5 is the empirical formula of vanadium oxide
Explanation:
The molecular mass of Vanadium is 50.949 g/mol
Number of moles of vanadium = 0.3456 g/50.949 g/mol = 0.00696 moles
The molecular mass of Oxygen is 16.0 g/mol
Number of moles of Oxygen = (0.6330 – 0.354) g/16 g/mol = 0.0174 moles
Emperical formula
V (0.00696 moles/0.00696 moles) O (0.0174 moles /0.00696 moles)
V 1 O2.5
Multiply by two get a whole number
V2 O5
Aluminium is a metal give reason
Answer:
Aluminium is ordinarily classified as a metal. It is lustrous, malleable and ductile, and has high electrical and thermal conductivity. Like most metals, it has a close-packed crystalline structure and forms a cation in an aqueous solution.
how many grams is 4.2 moles HCL
What is the Molar Mass of MgO?
Answer:
The answer should be 40.3044 g/mol
A mass of 80 grams of Bromine would be
Someone plz help me
Answer:
maybe falling
Explanation:
Air is a force so its probably pushing down the object then making it fall
I think all objects? Not entirely sure.
Numbers 15-21
HELP PLEASE!!
The diagram shows a large, eroded rock tower found in Southern Utah.
Which most likely caused the erosion?
C sunlight
O A animals
D. water
B. plants
make this and tell me how u like it its fat lady from hairy pawter find the pics on elgoog or use mine movie and site was changed its on scratch a web
Answer:
are u brocken
Explanation: