Why is H2S called an analytical agent?​

Answers

Answer 1

Answer:

Hydrogen sulfide is an newly recognized signical molecule with very potent cytoprotective actions.


Related Questions

What factor is mostly responsible for the form of matter?
time
temperature
pressure
weather

Answers

Temperature is mostly responsible for the form of matter. For instance, when raising the temperature you're adding energy. This energy gives the individual molecules and atoms the ability to overcome the forces that hold them together. This can be seen when a solid turns into a liquid or a liquid turns into a gas. However, when you're lowering the temperature you're removing energy. The lack of energy results in less movement from the atoms. Gases condense into liquid because the atoms don't have enough energy to stay away from each other. Liquids solidify because the atoms don't have enough energy to slide past each other and they get stuck in place. So in conclusion, temperature determines how how much energy atoms have that allow them to move at different speeds which determines the state of matter.

Which of the following situations best describes an ionic bond?
Two atoms each give up an electron, and an electrostatic force attracts them.
One atom gains an electron while the other atom loses an electron, and an
electrostatic force attracts them.
One atom gains an electron while the other atom loses an electron, and an
electrostatic force repels them.
Two atoms gain electrons and an electrostatic force attracts them.

Answers

One atom gains an electron while the other atom loses an electron and a electrostatic force attracts them.

The situation which best describes the ionic bond is “ One atom gains an electron while the other atom loses an electron, and an electrostatic force attracts them”.

What is an ionic bond?

An ionic bond is formed between two atoms by donating an electron from the electropositive atom and withdrawal of that electron by the second atom which is electronegative and thereby attaining stability by making their valency completed.

The electron loss-gain interaction make an electrostatic force of attraction between them, where the electrons from the electropositive atom is attracted towards the electronegative atom.

Thus the two atoms are bound together by the electrostatic force of attraction created by the electron donation. Hence, option b is correct.

To learn more about ionic bonding refer the link below;

https://brainly.com/question/12663276

#SPJ2

Lithium metal will react with aqueous aluminum sulfate. Write and balance the equation for this rxn, and then determine how many g of aluminum will result from 68.6 g lithium reacting with aluminum sulfate in excess.

Answers

Answer:

88.2 gram of aluminium .

Explanation:

6Li + Al₂ ( SO₄)₃ = 3Li₂SO₄ + 2Al

6 x 7 g                                    2 x 27 g

42 gram of lithium produces     54 gram of aluminium

68.6 gram of lithium will produce   88.2 gram of aluminium .

88.2 gram of aluminium will be produced.        

Describe what will eventually happen to the water level in the beaker.
Explain your reasoning.

Answers

Answer:

The water level in the beaker will eventually go down because some of the liquid water changes into ice (a solid) and the particles get closer together in the beaker. The water level in the beaker will eventually stay the same because some of the liquid water changes into water vapor (a gas) and leaves the beaker.

Write the equation for the dehydration of the CoCl2 hydrate

Answers

Answer:CoCI2+6H20
......hope this helped

Help PlS AFAP and thank you so much

Answers

the answer is B transfer thru direct contact

When does a single-displacement reaction occur?
A. When a substance, usually containing carbon, reacts with oxygen
to produce energy in the form of heat and light
B. When one element replaces another element in a compound
during a chemical reaction
C. When a substance is broken down into two or more simpler
substances in a chemical reaction
D. When a single element forms two double elements

Answers

Answer:

B. When one element replaces another element in a compound during a chemical reaction

Phosphorus and molecular oxygen combine to form diphosphorus pentoxide.
Write
a) the word equation
b) the skeletal equation
c) the reactant(s)
d) the product(s)
e) what type of reaction is this?

Answers

Answer:

b

Explanation:

because I really want to talk to you about it when I get home

which type of wave shows energy transmitted in a definite direction and with a definite speed?

Answers

The answer is traveling wave

Neurons contain which two structures that help them transmit messages?

sarcomeres

dendrites

an extracellular matrix

axons

Answers

Answer:

dendrites

axons

Explanation:

got it right on edg.

Answer:

B and D

Explanation:

edge

A ___ reaction takes two or more reactants to make one product

Answers

Answer:

Synthesis

Explanation:

A sysnthesis reaction takes two or more reactants to create one product

As we will soon see in Section 4.5, gasoline is a complex mixture of alkanes and other hydrocarbons, and the term "octane rating" is used as a standard measure of the performance of engine fuel. In the petroleum industry, one area of interest is the use of catalysts to convert unbranched alkanes and branched alkanes with higher octane ratings (Journal of the Japan Petroleum Institute 2004, 47, 1–10). For example, heptane can undergo isomerization in the presence of suitable catalysts to give eight different constitutional isomers, all of which are branched alkanes with the molecular formula C7H16. Draw all eight constitutional isomers, making sure not to draw the same compound twice.

Answers

Answer:

Explanation:

C₇H₁₆ is heptane and it has nine isomers (n-heptane and the remaining 8 constitutional isomers). Constitutional isomers are compounds with the same molecular formula but different structural formula or atom connectivity.

The constitutional isomers of n-pentane are 2-methylhexane, 3-methylhexane, 2,2-dimethylpentane, 2,3-dimethylpentane, 2,4-dimethylpentane, 3,3-dimethylpentane, 3-ethylpentane and 2,2,3-trimethylbutane. There structures are in the picture attached

As the atomic number of elements increases across a period on the periodic table, the atomic radius

Answers

Answer:

Decreases  

Explanation:

For the combustion of methane, CH4(g) + 2 O2(g) → CO2(g) + 2 H2O(l) △H = -213
kcal/mol

How many kilocalories of energy are released from 5.0 mol of methane?
How many moles of methane are needed to give 100. kcal heat?

Answers

Answer:

1.-213(kcal/mol)*5mol=1065kcal

2.100/213 mol

a. The energy released from 5.0 mol of methane is -1065 kcal/mol.

b. The number of moles of methane needed to give 100. kcal heat is 0.4694 moles.

What is combustion?

Combustion is a chemical process in which the element reacts with oxygen to produce heat and light. Burning of wood.

The equation of combustion of methane:

CH₄ (g) + 2O₂(g) ------> CO₂ (g) + 2H₂O (l)

a) Enthalpy of the reaction is H = -213 Kcal/mol

This means 213 Kcal heat is released in the burning of one mole of CH4

H reaction = [ H products ] - [ H reactants ]

Hr = [ H(CO₂)g + 2H(H₂O)l ] - [ H(CH₄)g ] = -213 kcal/mol

For 5 moles of methane:

5CH₄(g) + 10O₂(g) -----> 5CO₂(g) + 10H₂O(l)

therefore, new Hr = 5 x -213 = -1065 kcal/mol

H reaction = -1065 kcal/mol

b) 213 kcal is released per mole of Methane

then, to release 100 kcal we need, 100 / (213) = 0.4694 moles

Thus, the energy released is -1065 kcal/mol, and the number of moles is 0.4694 moles.

Learn more about combustion, here:

https://brainly.com/question/15117038

#SPJ5

Electronic configuration PLZZZ GUYSS(sub shell distribution) for L shell will be .........................

Answers

Answer:

Shells

The maximum number of electrons that can be accommodated in a shell is based on the principal quantum number (n). It is represented by the formula 2n2, where ‘n’ is the shell number. The shells, values of n, and the total number of electrons that can be accommodated are tabulated below.

Shell and ‘n’ value Max. Electrons in the Electron Configuration

K shell, n=1 2*12 = 2

L shell, n=2 2*22 = 8

M shell, n=3 2*32 = 18

N shell, n=4 2*42 = 32

L shell:  n =2

hence,

2n²

= 2(2)²

i.e. 8 electrons can fit in the l shell

hence max no. of electrons is 8

so configuration in L shell is,

2, 8...

75 g of a metal is heated to a temperature of 99C. The metal is then placed in a calorimeter containing 145 g of water at a temperature of 25C. The temperature of the water in the calorimeter increase to a final temperature of 28C. What is the specific heat of the metal?

Answers

Answer:

0.34 J / g ⁰C

Explanation:

Let the specific heat of metal be s .

heat will be lost by hot metal and gained by water .

heat lost by metal = mass x specific heat x loss of temperature

= 75 x s x ( 99 - 28 ) = 5325 s

heat gained by water = mass x specific heat x gain of temperature

= 145 x 4.18 x ( 28 - 25 ) = 1818.3

heat lost = heat gained

5325 s = 1818.3

s = 0.34 J / g ⁰C

Freezing point
Where would you place this property in the Venn diagram?

Answers

For the Venn diagram, freezing water should be in the physical category (A)
I would pick A :) :)

Is the moons rate rotation that same as earths

Answers

Answer:

no

Explanation:

Answer:no

Explanation:The moon orbits the Earth once every 27.322 days. It also takes approximately 27 days for the moon to rotate once on its axis.

A balloon containing methane gas has a volume of 1.03 L at 99.0 °C . What volume will the balloon occupy at 198 °C ?

Answers

Answer:

The balloon will occupy a volume of 1.32L.

Explanation:

Given the following data;

Original Volume, V1 = 1.03L

Original Temperature, T1 = 99°C

New Temperature, T2 = 198°C

To find new volume V2, we would use Charles' law.

Charles states that when the pressure of an ideal gas is kept constant, the volume of the gas is directly proportional to the absolute temperature of the gas.

Mathematically, Charles is given by;

[tex] VT = K[/tex]

[tex] \frac{V1}{T1} = \frac{V2}{T2}[/tex]

Converting T1, from Celsius to Kelvin = 273 + 99 = 372K

Converting, T2, from Celsius to Kelvin = 273 + 198 = 471K

[tex] \frac{V1}{T1} = \frac{V2}{T2}[/tex]

Making V2 as the subject formula, we have;

[tex] V_{2}= \frac{V1}{T1} * T_{2}[/tex]

[tex] V_{2}= \frac{1.03}{372} * 471[/tex]

[tex] V_{2}= 0.0028 * 471[/tex]

V2 = 1.32L

Therefore, the balloon will occupy a volume of 1.32L at 198°C

What is the velocity of a wave?

A. How much energy the wave has
B. How quickly the wave travels
C. The distance between two wave peaks
D. The distance between the high and low points of the wave

Answers

The answer is b. How quickly the wave travels

Statement 1: The reaction follows the mass energy equation E= mc". Statement 2: A large amount of energy is produced during the reaction.
Which statement(s) are true for both fusion and fission reactions? (1 point)
a. Only 1
b. Only 2
c. Both 1 and 2
d. Neither 1 nor 2

Answers

Answer:

Neither

Explanation:

The statements are true for both fusion and fission reactions are the fission is the breaking of a heavy, unstable nucleus into two lighter nuclei, and fusion is the process where two light nuclei join together releasing large amounts of energy. Therefore, option D is correct.

What do you mean by fission ?

The term fission is defined as when a neutron slam into a larger atom, forcing it to excite and split into two smaller atoms.

Additional neutrons are released, which can set off a chain reaction. A tremendous amount of energy is released when each atom splits.

When a neutron strikes an atom of uranium-235, it splits into two lighter nuclei, krypton and barium.

Both fission and fusion reactions involve the conversion of some mass into energy in order to form a new nucleus or nuclei, which requires some nuclear binding energy.

Thus, option D is correct.

To learn more about fission, follow the link;

https://brainly.com/question/2732120

#SPJ2

Chemical equation to show cdso4 dissolves in water

Answers

no se bb si quieres salimos tu sabes

Answer quick (image)

Answers

Answer:

The answer is boiling point

Calculate mass of an object if its density is 22.6 g/cm3 and it occupies volume of 5 cm3.

plz answer quickly if you know the answer... i will mark you brainliest! :)

Answers

Answer:

okay so I'm confused for the 5 cm3 but all you have to do is multiply those 2 numbers

Answer:

it is 113g

Explanation:

the formula you have to use here is mass=density*volume

sooo I multiplied it for u and gave the answer

which group of substances are elements?
A.Air,water,cooking oil
B.carbondioxide,water,table salt
C.carbon,hydrogen,oxygen
D.rock,soil,iron ore​

Answers

Answer:

C

Explanation:

(A+B) are compounds and D is mixtures

PLEASE HELP ME!!
I am smaller than Rb and bigger than Na but we are in the same family.
H
K
N
Cs
Is it easier to remove an electron from Mg or from Cl?
Mg
Cl

Answers

Answer: K and Mg

Explanation:

The first one refers to the atomic radius and increases going down and to the left on the periodic table. K is in between Rb and Na.

At what time was the frog sitting still or at rest

Answers

Answer:

frogs don't spend all their time swimming, nor do they spend all ... The frog is capable of sitting perfectly still for hours on end, only to suddenly ... When a frog is resting or hunting, he will sit on whatever is handy.

Explanation:

Hope I helped if I did please mark me brainiest Thanks! <333 :3

what is the relationship between netforce and acceleration based on the situation?​

Answers

Answer:

The net force is greater at the second situation as well as the acceleration due to the contribution of the second guy.

Explanation:

Hello.

In this case, since the net force is computed via adding all the exerted forces on a body, for the first situation we can see that the net force equals the force provided by that guy when pulling, whereas in the second situation the net force equals the force of both of the guys pulling the car:

[tex]F_N_1=F_1\\\\F_N_2=F_1+F_2[/tex]

For the acceleration, we can see that applying an extra force (due to the second guy) turns out into a greater acceleration, that is why the car at the second situation reaches the tree whereas the other one does not.

Best regards.

Electrons in the outermost shell of an atom that are available to bond with the electrons of other atoms are
Question 11 options:

A)

cations.

B)

free electrons.

C)

valence electrons.

D)

anions.
Question 12 (5 points)
Main group elements have valence electrons in which suborbitals?
Question 12 options:

A)

d and f

B)

s and p

C)

p and f

D)

s and d
Question 13 (5 points)
Molecules have
Question 13 options:

A)

only kinetic energy.

B)

only potential energy.

C)

both potential and kinetic energy.

D)

neither kinetic nor potential energy.
Question 14 (5 points)
The majority of elements are
Question 14 options:

A)

metalloids.

B)

nonmetals.

C)

metals.

D)

inert.
Question 15 (5 points)
A student found the mass of an object to be 26.5 g. To find the volume, the student submerged the object in a graduated cylinder of water. Submerging the object in the water in the graduated cylinder increased the water level by 24.1 mL. The density of the object is
Question 15 options:

A)

1.0906 g/mL.

B)

0.909 g/mL.

C)

1.10 g/mL.

D)

1.1 g/mL.

Answers

Answer:

c

Explanation:

definitely

Answer: 11; C

Explanation:

valance electrons

Photosynthesis happens in the _____
O: lower epidermis
O: upper epidermis
O: palisade layer
O: spongy layer

Answers

O: palisade layer and please answer the question I am gonna post right now pleaseeee
Other Questions
Alex eats 5/6 of a pizza. His father eats 1 1/5 times as much pizza as Alex. How much of the pizza does Alex's father eat? ASAP!!!!!!!!!!! Find the slope and y What term for the current cooling of surface temperatures in the Pacific Ocean can impact weather across the world In two to three sentences, explain the trend for atomic size. Why does this trend occur? EVERYONE IS BLEEDING ON THE MARBLE FLOOR Select the correct answer.Time management includes all of the following EXCEPT:Setting objectives Exceeding your limits Creating a personals mission statement Avoiding distractions The largest slave owning states were:Group of answer choices The unit for force is kg m/s.True Or false? Plz help (mayflower compact)Why is it important and answer the question plzz Write and expression equivalent to - 1/2(6x-8+4x please help What does normal force have to do with gravity? HELP ME PLZZZZZZZZZZZZZZZZZ!!!!!!!!!! Federalists Anti-FederalistsA Favored a strong national government Feared the tyranny of a strongnational governmentB Feared a weak national government Said a bill of rights not needed due tochecks on Federal power within the ConstitutionC Opposed confederation form of government Feared states would lose power underthe new ConstitutionD Drew support from planters, merchants,and urban dwellers Drew support from small farmersand rural citizensWhich of these INCORRECTLY describes the Federalist and Anti-Federalist views on government?A) D EliminateB) C C) B D) A Why is it important for biologists tounderstand the different types ofinteractions in an ecosystem? Which people agreed to use a part of the lords land and promised to be loyal and fight for their lord ? The sum of two numbers is 43, the difference is 7. Find the numbers What happened to the Panama Canal in 1999n Which of the following is closest to the value of the expression 3 x (square root of 2)?Select one:01.403.804.204.4 equation of the horizontal line that passes through the point (-5,1) what is miller saying about accusations in the crucible